Curious about the bug here. Would you explain the issue?
This code is no longer present, but jboesch had a fix for inconsistent width on inputs and buttons due to the different default behavior of box-sizing in different browsers. Different widths were being returned for different browsers, but due to the aforementioned box-sizing style being different, we were actually returning correct values. However, there is still a problem in IE8 even when box-sizing: content-box is set. http://bugs.jquery.com/ticket/4146
Thanks for explaining it :D