Original report: http://code.google.com/p/chromium/issues/detail?id=58918 Reduction (notice the different rendering in Firefox and WebKit): <div style="float: right; width: 300px; background-color: yellow">x</div> <div style="background-color: blue"> <div style="overflow: hidden; width:500px; margin-left: auto; margin-right: auto; background-color:green"> y
data:text/html,<div style="float: right; width: 300px; background-color: yellow">x</div><div style="background-color: blue"><div style="overflow: hidden; width:500px; margin-left: auto; margin-right: auto; background-color:green">y This looks right to me now - can you confirm?