Created attachment 247679 [details]
Screenshot of bug
The bottom bar on http://www.ibm.com/cloud-computing/in/en/ is positioned incorrectly. See attached screenshot.
This was initially found in Blink (https://code.google.com/p/chromium/issues/detail?id=463040), but WebKit has the same issue.
Created attachment 248546 [details]
Minimal test case
Created attachment 248937 [details]
Firefox rendering of minimal test case
Interestingly enough, Firefox renders the minimal test case in an entirely different way than even WebKit did before the offending patch. However, it renders the IMB page correctly.
Unfortunately, it looks like IBM changed their site, so it no longer reproduces there. The minimal test case that I created is still working, but it is confusing that it has a different rendering in Firefox than in stable Safari. The FireFox rendering is much closer to the rendering in WebKit trunk.