The web search button cuts into the text box. No other browsers I use have this problem.
This actually happens on Opera 9.21 and Firefox 2.0.0.4 on Mac OS X 10.4.10 (8R218). It's not as obvious since there is no focus ring around their text fields, but if you type far enough, you'll see that the button overlaps the text fields on those browsers as well. I haven't tested MSIE 6 or 7 yet, though.