I'm hoping someone else can reproduce this issue, but I haven't been able to find out much about what might be going on. I'm running Windows 7 and Internet Explorer 8 by default. When I preview a flex application in IE (with or without compatability mode) I see extra background to the right and bottom of the application. If I constrain the application to dimensions smaller than the content inside the application, this extra padding shows up to the right and bottom of the scroll bars.
When I view the application on other computers with IE 8 but running Vista I don't see this. I also don't see it when I check the file in any other browser.
So far any application I create has done this, but the application I've been testing with is:
I'm pretty certain at this point it's not a code issue, but the code for the above app looks like:
<?xml version="1.0" encoding="utf-8"?>
width="300" height="300" >
<mx:Canvas width="100%" height="100%" backgroundColor="#7D4242">
Well I fixed it, and what an extended brain fart that was. The zoom setting in IE was 105%.