IE loading css problem

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A couple of days ago we used gwt-dnd library in our project, we added
<inherits name='com.allen_sauer.gwt.dnd.gwt-dnd'/>
to the .gwt.xml file and followed all steps.

It worked fine and everything is ok on all browsers except IE. I made sure that 
this was causing the problem by updating all files and removing it and its code 
dependencies, and after that IE loaded well.

As I noticed so far, IE does not load all css styles, for example it hides the 
header and footer and other basic components.

Also, I searched through forum, and found this:
https://groups.google.com/forum/#!topic/gwt-dnd/S9T9h0Km4bg
in which it says we need one css file for the system (which we already do).

Also I checked my GWT and gwt-dnd versions, I was using GWT 2.6.0 with gwt-dnd 
3.3.0 . I updated to latest versions for both and nothing changed.

Original issue reported on code.google.com by [email protected] on 19 Oct 2014 at 7:37