diff --git a/AppKit/Jakefile b/AppKit/Jakefile
index 70db16a3d..69f958e4c 100644
--- a/AppKit/Jakefile
+++ b/AppKit/Jakefile
@@ -1,8 +1,6 @@
 
 require("../common.jake");
 
-checkUlimit();
-
 var framework = require("objective-j/jake").framework,
     BundleTask = require("objective-j/jake").BundleTask;
 
diff --git a/CommonJS/bin/press b/CommonJS/bin/press
index c4e6b5571..b89bb49d4 100755
--- a/CommonJS/bin/press
+++ b/CommonJS/bin/press
@@ -366,23 +366,38 @@ function pressEnvironment(rootPath, outputFiles, environment, options) {
     return {executable:includedBytes, data:dataBytes, mhtml:mhtmlBytes};
 }
 
-function pngcrushDirectory(directory) {
-    var directoryPath = FILE.path(directory);
-    var pngs = directoryPath.glob("**/*.png");
+function pngcrushDirectory(directory)
+{
+    var directoryPath = FILE.path(directory),
+        pngs = directoryPath.glob("**/*.png");
 
     system.stderr.print("Running pngcrush on " + pngs.length + " pngs:");
-    pngs.forEach(function(dstPath) {
+    pngs.forEach(function(dstPath)
+    {
         var tmpPath = FILE.path(dstPath+".tmp");
 
-        var p = OS.popen(["pngcrush", "-rem", "alla", "-reduce", /*"-brute",*/ dstPath, tmpPath]);
-        if (p.wait()) {
-            CPLog.warn("pngcrush failed. Ensure it's installed and on your PATH.");
+        try
+        {
+            var p = OS.popen(["pngcrush", "-rem", "alla", "-reduce", /*"-brute",*/ dstPath, tmpPath]);
+
+            if (p.wait())
+            {
+                CPLog.warn("pngcrush failed. Ensure it's installed and on your PATH.");
+            }
+            else
+            {
+                FILE.move(tmpPath, dstPath);
+                system.stderr.write(".").flush();
+            }
         }
-        else {
-            FILE.move(tmpPath, dstPath);
-            system.stderr.write(".").flush();
+        finally
+        {
+            p.stdin.close();
+            p.stdout.close();
+            p.stderr.close();
         }
     });
+
     system.stderr.print("");
 }
 
diff --git a/CommonJS/lib/cappuccino/fontinfo.j b/CommonJS/lib/cappuccino/fontinfo.j
index beff36b9e..4fb9385a0 100644
--- a/CommonJS/lib/cappuccino/fontinfo.j
+++ b/CommonJS/lib/cappuccino/fontinfo.j
@@ -3,10 +3,20 @@ var OS = require("os");
 
 exports.fontinfo = function(name, size)
 {
-    var p = OS.popen(["fontinfo", "-n", name, size || 12]);
+    var result;
 
-    if (p.wait() === 0)
-        return JSON.parse(p.stdout.read());
-    else
-        return null;
+    try
+    {
+        var p = OS.popen(["fontinfo", "-n", name, size || 12]);
+        if (p.wait() === 0)
+            result = p.stdout.read();
+    }
+    finally
+    {
+        p.stdin.close();
+        p.stdout.close();
+        p.stderr.close();
+    }
+
+    return result ? JSON.parse(result) : null;
 };
diff --git a/CommonJS/lib/cappuccino/imagesize.j b/CommonJS/lib/cappuccino/imagesize.j
index c6e534bfa..2d88f8085 100644
--- a/CommonJS/lib/cappuccino/imagesize.j
+++ b/CommonJS/lib/cappuccino/imagesize.j
@@ -3,10 +3,20 @@ var OS = require("os");
 
 exports.imagesize = function(path)
 {
-    var p = OS.popen(["imagesize", "-n", path]);
+    var result;
 
-    if (p.wait() === 0)
-        return JSON.parse(p.stdout.read());
-    else
-        return null;
+    try
+    {
+        var p = OS.popen(["imagesize", "-n", path]);
+        if (p.wait() === 0)
+            result = p.stdout.read();
+    }
+    finally
+    {
+        p.stdin.close();
+        p.stdout.close();
+        p.stderr.close();
+    }
+
+    return result ? JSON.parse(result) : null;
 };
diff --git a/Jakefile b/Jakefile
index 56a4e30aa..9bbc5ff57 100644
--- a/Jakefile
+++ b/Jakefile
@@ -128,12 +128,21 @@ function generateDocs(/* boolean */ noFrame)
     // If the Doxygen application is installed on Mac OS X, use that
     if (!doxygen && executableExists("mdfind"))
     {
-        var p = OS.popen(["mdfind", "kMDItemContentType == 'com.apple.application-bundle' && kMDItemCFBundleIdentifier == 'org.doxygen'"]);
-        if (p.wait() === 0)
+        try
         {
-            var doxygenApps = p.stdout.read().split("\n");
-            if (doxygenApps[0])
-                doxygen = FILE.join(doxygenApps[0], "Contents/Resources/doxygen");
+            var p = OS.popen(["mdfind", "kMDItemContentType == 'com.apple.application-bundle' && kMDItemCFBundleIdentifier == 'org.doxygen'"]);
+            if (p.wait() === 0)
+            {
+                var doxygenApps = p.stdout.read().split("\n");
+                if (doxygenApps[0])
+                    doxygen = FILE.join(doxygenApps[0], "Contents/Resources/doxygen");
+            }
+        }
+        finally
+        {
+            p.stdin.close();
+            p.stdout.close();
+            p.stderr.close();
         }
     }
 
diff --git a/Objective-J/CFHTTPRequest.js b/Objective-J/CFHTTPRequest.js
index 37bdf61e8..0d34667f2 100644
--- a/Objective-J/CFHTTPRequest.js
+++ b/Objective-J/CFHTTPRequest.js
@@ -277,12 +277,12 @@ CFHTTPRequest.prototype.removeEventListener = function(/*String*/ anEventName, /
     this._eventDispatcher.removeEventListener(anEventName, anEventListener);
 };
 
-CFHTTPRequest.prototype.setWithCredentials = function(/*Boolean*/ willSendWithCredentials) 
+CFHTTPRequest.prototype.setWithCredentials = function(/*Boolean*/ willSendWithCredentials)
 {
     this._nativeRequest.withCredentials = willSendWithCredentials;
 };
 
-CFHTTPRequest.prototype.withCredentials = function() 
+CFHTTPRequest.prototype.withCredentials = function()
 {
     return this._nativeRequest.withCredentials;
 };
@@ -323,12 +323,21 @@ function FileRequest(/*CFURL*/ aURL, onsuccess, onfailure, onprogress)
         var aFilePath = aURL.toString().substring(5),
             OS = require("os"),
             gccFlags = require("objective-j").currentCompilerFlags(),
-            gcc = OS.popen("gcc -E -x c -P " + (gccFlags ? gccFlags : "") + " " + OS.enquote(aFilePath), { charset:"UTF-8" }),
             chunk,
             fileContents = "";
 
-        while (chunk = gcc.stdout.read())
-            fileContents += chunk;
+        try
+        {
+            var gcc = OS.popen("gcc -E -x c -P " + (gccFlags ? gccFlags : "") + " " + OS.enquote(aFilePath), { charset:"UTF-8" });
+            while (chunk = gcc.stdout.read())
+                fileContents += chunk;
+        }
+        finally
+        {
+            gcc.stdin.close();
+            gcc.stdout.close();
+            gcc.stderr.close();
+        }
 
         if (fileContents.length > 0)
         {
diff --git a/Objective-J/CommonJS/lib/objective-j/compiler.js b/Objective-J/CommonJS/lib/objective-j/compiler.js
index 65079fd48..34416cde0 100644
--- a/Objective-J/CommonJS/lib/objective-j/compiler.js
+++ b/Objective-J/CommonJS/lib/objective-j/compiler.js
@@ -46,18 +46,39 @@ function compileWithResolvedFlags(aFilePath, objjcFlags, gccFlags, asPlainJavasc
 
     if (!shouldObjjPreprocess)
     {
-        if (OS.popen("which gcc").stdout.read().length === 0)
-            fileContents = FILE.read(aFilePath, { charset:"UTF-8" });
-        else
+        try
         {
-            // GCC preprocess the file.
-            var gcc = OS.popen("gcc -E -x c -P " + (gccFlags ? gccFlags.join(" ") : "") + " " + OS.enquote(aFilePath), { charset:"UTF-8" }),
-                chunk = "";
+            var p = OS.popen("which gcc");
 
-            while (chunk = gcc.stdout.read())
-                fileContents += chunk;
+            if (p.stdout.read().length === 0)
+            {
+                fileContents = FILE.read(aFilePath, { charset:"UTF-8" });
+            }
+            else
+            {
+                try
+                {
+                    var gcc = OS.popen("gcc -E -x c -P " + (gccFlags ? gccFlags.join(" ") : "") + " " + OS.enquote(aFilePath), { charset:"UTF-8" }),
+                        chunk = "";
 
+                    while (chunk = gcc.stdout.read())
+                        fileContents += chunk;
+                }
+                finally
+                {
+                    gcc.stdin.close();
+                    gcc.stdout.close();
+                    gcc.stderr.close();
+                }
+            }
         }
+        finally
+        {
+            p.stdin.close();
+            p.stdout.close();
+            p.stderr.close();
+        }
+
         return fileContents;
     }
 
diff --git a/Objective-J/CommonJS/lib/objective-j/jake.js b/Objective-J/CommonJS/lib/objective-j/jake.js
index 7d4bc9048..b1683c037 100644
--- a/Objective-J/CommonJS/lib/objective-j/jake.js
+++ b/Objective-J/CommonJS/lib/objective-j/jake.js
@@ -22,7 +22,6 @@
 
 var FILE = require("file");
 
-
 var BUNDLE_TASK = require("objective-j/jake/bundletask");
 
 exports.BundleTask = BUNDLE_TASK.BundleTask;
diff --git a/Objective-J/Jakefile b/Objective-J/Jakefile
index ca5bfeda9..2c83a5562 100644
--- a/Objective-J/Jakefile
+++ b/Objective-J/Jakefile
@@ -40,8 +40,8 @@ $BROWSER_FILES      = new FileList($BROWSER_FILE).include($OBJECTIVEJ_FILES);
 
 filedir($BUILD_BROWSER_FILE, $BROWSER_FILES, function(aTask)
 {
-    gcc($BROWSER_FILE, 
-        $BUILD_BROWSER_FILE, 
+    gcc($BROWSER_FILE,
+        $BUILD_BROWSER_FILE,
         environmentFlags("Browser", "ObjJ").concat($INCLUDE_FLAGS, $DEBUG_FLAGS), $CONFIGURATION !== "Debug");
 });
 
@@ -119,11 +119,20 @@ function gcc(inputFilePath, outputFilePath, flags, compress)
     stream.print("Building... \0green(" + outputFilePath +"\0)");
 
     // GCC preprocess the file.
-    var cmd = ["gcc", "-E", "-x", "c", "-P"].concat(flags, inputFilePath).join(" ");
-    var gcc = OS.popen(cmd, { charset:"UTF-8" });
+    var cmd = ["gcc", "-E", "-x", "c", "-P"].concat(flags, inputFilePath).join(" "),
+        contents = FILE.read("header.txt", { charset : "UTF-8" });
 
-    var contents = FILE.read("header.txt", { charset : "UTF-8" });
-    contents += gcc.stdout.read();
+    try
+    {
+        var gcc = OS.popen(cmd, { charset:"UTF-8" });
+        contents += gcc.stdout.read();
+    }
+    finally
+    {
+        gcc.stdin.close();
+        gcc.stdout.close();
+        gcc.stderr.close();
+    }
 
     if (FILE.extension(inputFilePath) === ".js" && compress)
         contents = compressor(contents);
diff --git a/Tools/XcodeCapp/Jakefile b/Tools/XcodeCapp/Jakefile
index 764cce92f..dc08dd52c 100644
--- a/Tools/XcodeCapp/Jakefile
+++ b/Tools/XcodeCapp/Jakefile
@@ -13,22 +13,34 @@ task ("build", function()
         OS.exit(0);
 
     // No building on 10.6
-    var p = OS.popen(["sw_vers", "-productVersion"]);
-
-    if (p.wait() === 0)
+    try
     {
-        var versions = p.stdout.read().split("."),
-            majorVersion = parseInt(versions[0], 10),
-            minorVersion = parseInt(versions[1], 10),
-            buildVersion = parseInt(versions[2], 10);
+        var p = OS.popen(["sw_vers", "-productVersion"]);
 
-        if (majorVersion < 10 || minorVersion < 7)
+        if (p.wait() === 0)
         {
-            colorPrint("XcodeCapp can only be built on Mac OS X 10.7+. You can download the binary here: https://www.dropbox.com/sh/gxdgm356gyb9tqc/rFNyl8hcVG", "red");
+            var versions = p.stdout.read().split("."),
+                majorVersion = parseInt(versions[0], 10),
+                minorVersion = parseInt(versions[1], 10),
+                buildVersion = parseInt(versions[2], 10);
 
-            OS.exit(0);
+            if (majorVersion < 10 || minorVersion < 7)
+            {
+                colorPrint("XcodeCapp can only be built on Mac OS X 10.7+. You can download the binary here: https://www.dropbox.com/sh/gxdgm356gyb9tqc/rFNyl8hcVG", "red");
+
+                p.stdin.close();
+                p.stdout.close();
+                p.stderr.close();
+                OS.exit(0);
+            }
         }
     }
+    finally
+    {
+        p.stdin.close();
+        p.stdout.close();
+        p.stderr.close();
+    }
 
     if (executableExists("xcodebuild"))
     {
diff --git a/Tools/nib2cib/Converter.j b/Tools/nib2cib/Converter.j
index 549a32bdf..09407a086 100644
--- a/Tools/nib2cib/Converter.j
+++ b/Tools/nib2cib/Converter.j
@@ -119,8 +119,19 @@ ConverterConversionException = @"ConverterConversionException";
             // Compile xib or nib to make sure we have a non-new format nib.
             temporaryNibFilePath = FILE.join("/tmp", FILE.basename(aFilePath) + ".tmp.nib");
 
-            if (OS.popen(["/usr/bin/ibtool", aFilePath, "--compile", temporaryNibFilePath]).wait() === 1)
-                [CPException raise:ConverterConversionException reason:@"Could not compile file: " + aFilePath];
+            try
+            {
+                var p = OS.popen(["/usr/bin/ibtool", aFilePath, "--compile", temporaryNibFilePath]);
+                if (p.wait() === 1)
+                    [CPException raise:ConverterConversionException reason:@"Could not compile file: " + aFilePath];
+            }
+            finally
+            {
+                p.stdin.close();
+                p.stdout.close();
+                p.stderr.close();
+            }
+
         }
         else
         {
@@ -130,8 +141,18 @@ ConverterConversionException = @"ConverterConversionException";
         // Convert from binary plist to XML plist
         var temporaryPlistFilePath = FILE.join("/tmp", FILE.basename(aFilePath) + ".tmp.plist");
 
-        if (OS.popen(["/usr/bin/plutil", "-convert", "xml1", temporaryNibFilePath, "-o", temporaryPlistFilePath]).wait() === 1)
-            [CPException raise:ConverterConversionException reason:@"Could not convert to xml plist for file: " + aFilePath];
+        try
+        {
+            var p = OS.popen(["/usr/bin/plutil", "-convert", "xml1", temporaryNibFilePath, "-o", temporaryPlistFilePath]);
+            if (p.wait() === 1)
+                [CPException raise:ConverterConversionException reason:@"Could not convert to xml plist for file: " + aFilePath];
+        }
+        finally
+        {
+            p.stdin.close();
+            p.stdout.close();
+            p.stderr.close();
+        }
 
         if (!FILE.isReadable(temporaryPlistFilePath))
             [CPException raise:ConverterConversionException reason:@"Unable to convert nib file."];
diff --git a/Tools/nib2cib/main.j b/Tools/nib2cib/main.j
index b5296c7b8..1bdc7aef1 100644
--- a/Tools/nib2cib/main.j
+++ b/Tools/nib2cib/main.j
@@ -28,27 +28,7 @@ var OS = require("os"),
 
 function main(args)
 {
-    checkUlimit();
-
     var nib2cib = [[Nib2Cib alloc] initWithArgs:args];
 
     [nib2cib run];
 }
-
-function checkUlimit()
-{
-    var minUlimit = 1024,
-        p = OS.popen(["ulimit", "-n"]);
-
-    if (p.wait() === 0)
-    {
-        var limit = p.stdout.read().split("\n")[0];
-
-        if (Number(limit) < minUlimit)
-        {
-            stream.print("\0red(\0bold(WARNING:\0)\0) nib2cib may need to open more files than this terminal session currently allows (" + limit + "). Add the following line to your login configuration file (.bash_profile, .bashrc, etc.), start a new terminal session, then try again:\n");
-            stream.print("ulimit -n " + minUlimit);
-            OS.exit(1);
-        }
-    }
-}
diff --git a/common.jake b/common.jake
index f9a7f6569..f50b85b11 100644
--- a/common.jake
+++ b/common.jake
@@ -378,11 +378,20 @@ global.setPackageMetadata = function(packagePath)
 {
     var pkg = JSON.parse(FILE.read(packagePath, { charset : "UTF-8" }));
 
-    var p = OS.popen(["git", "rev-parse", "--verify", "HEAD"]);
-    if (p.wait() === 0) {
-        var sha = p.stdout.read().split("\n")[0];
-        if (sha.length === 40)
-            pkg["cappuccino-revision"] = sha;
+    try
+    {
+        var p = OS.popen(["git", "rev-parse", "--verify", "HEAD"]);
+        if (p.wait() === 0) {
+            var sha = p.stdout.read().split("\n")[0];
+            if (sha.length === 40)
+                pkg["cappuccino-revision"] = sha;
+        }
+    }
+    finally
+    {
+        p.stdin.close();
+        p.stdout.close();
+        p.stderr.close();
     }
 
     pkg["cappuccino-timestamp"] = new Date().getTime();
@@ -577,31 +586,6 @@ global.colorPrint = function(/* String */ message, /* String */ color)
     stream.print(colorize(message, color));
 };
 
-var minUlimit = 1024;
-
-global.checkUlimit = function()
-{
-    var ulimitPath = executableExists("ulimit");
-
-    if (!ulimitPath)
-        return;
-
-    var p = OS.popen([ulimitPath, "-n"]);
-
-    if (p.wait() === 0)
-    {
-        var limit = p.stdout.read().split("\n")[0];
-
-        if (Number(limit) < minUlimit)
-        {
-            stream.print("\0red(\0bold(ERROR:\0)\0) Cappuccino may need to open more files than this terminal session currently allows (" + limit + "). Add the following line to your login configuration file (.bash_profile, .bashrc, etc.), start a new terminal session, then try again:\n");
-            stream.print("ulimit -n " + minUlimit);
-            OS.exit(1);
-        }
-    }
-}
-
-
 // built in tasks
 
 task ("build");