Fixed: text field font size while editing was wrong in Internet Explorer.

Tested in Internet Explorer 8 and 9.

AppKit/CPCompatibility.j

@@ -67,6 +67,9 @@ CPHTML5DragAndDropSourceYOffBy1         = 1 << 26;
 
 CPSOPDisabledFromFileURLs               = 1 << 27;
 
+// element.style.font can be set for an element not in the DOM.
+CPInputSetFontOutsideOfDOM              = 1 << 28;
+
 var USER_AGENT                          = "",
     PLATFORM_ENGINE                     = CPUnknownBrowserEngine,
     PLATFORM_FEATURES                   = 0;
@@ -74,6 +77,7 @@ var USER_AGENT                          = "",
 // default these features to true
 
 PLATFORM_FEATURES |= CPInputTypeCanBeChangedFeature;
+PLATFORM_FEATURES |= CPInputSetFontOutsideOfDOM;
 
 if (typeof window !== "undefined" && typeof window.navigator !== "undefined")
     USER_AGENT = window.navigator.userAgent;
@@ -99,6 +103,9 @@ else if (typeof window !== "undefined" && window.attachEvent) // Must follow Ope
     PLATFORM_FEATURES |= CPOpacityRequiresFilterFeature;
 
     PLATFORM_FEATURES &= ~CPInputTypeCanBeChangedFeature;
+
+    // Tested in Internet Explore 8 and 9.
+    PLATFORM_FEATURES &= ~CPInputSetFontOutsideOfDOM;
 }
 
 // WebKit

AppKit/CPTextField.j

@@ -509,7 +509,8 @@ CPTextFieldStatePlaceholder = CPThemeState("placeholder");
 
     element.value = _stringValue;
     element.style.color = [[self currentValueForThemeAttribute:@"text-color"] cssString];
-    element.style.font = [font cssString];
+    if (CPFeatureIsCompatible(CPInputSetFontOutsideOfDOM))
+        element.style.font = [font cssString];
     element.style.zIndex = 1000;
 
     switch ([self alignment])
@@ -552,6 +553,10 @@ CPTextFieldStatePlaceholder = CPThemeState("placeholder");
 
     _DOMElement.appendChild(element);
 
+    // The font change above doesn't work for some browsers if the element isn't already .appendChild'ed.
+    if (!CPFeatureIsCompatible(CPInputSetFontOutsideOfDOM))
+        element.style.font = [font cssString];
+
     window.setTimeout(function()
     {
         element.focus();