User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_3; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.86 Safari/533.4 Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.6) Gecko/20100625 Firefox/3.6.6 When overflow:hidden is set on a button element it behaves like overflow:visible. Reproducible: Always Steps to Reproduce: 1.<button style="width:33px;white-space:nowrap;overflow:hidden;">This text should not flow over the right edge of the button</button> Actual Results: The text displays as if overflow:visible is set instead of being hidden. Expected Results: Any overflowing text should be hidden. In my tests this bug was not present in Firefox versions 3.5.6 or 3.5.10 . All other browsers render this as expected.

This is fixed in 1.9.2.7 (Fx 3.6.7)