I had noticed a flaw a few days ago and now I see this thread. Not to complain, just trying to help you out..

Actually there is a pretty evident flaw visible in IE in themes 2,3 and 4

Look at the green table row below, right to the left of where it says Search Videos, the columns merge un-evenly and continues until the end of the search box column. Then the same problem exists on the same green table row, the far right column where it says upload a Video

Hope this helps.

Capture of Template4