I just had a look at this query What posts have I edited that were not mine?. Its result is a quite wide table (more than twice the screen width with my browser), so horizontally scrolling is necessary.
But if I do this, the header fields do not scroll with the rest of the table. This is annoying, as I now don't know how the fields on the right side are even called.
This is on Opera 11.50 (Ubuntu 11.04).