I just downloaded the RC3 of ExtJS 4.1 today and discovered that there appears to be a missing image in the release. The CSS file is referencing an image called 'images/x-grouptabs-corners.gif'. This image does not exist in the release zip file anywhere. When I run the GroupTabs.html example page (which isn't linked into the Examples section of the documentation, btw) I get an error in Firebug that it couldn't load that image.
Can someone post that image in this thread so I can get it (as well as make sure that the image is included in the release next time)?