Created attachment 119766 [details] CSS that requires 100% to work I've been seeing a weird issue with a -webkit-box being zero height when it's parent has a height. Setting height: 100% fixes it, but I didn't think I needed to specify the height. Resizing the window or the parent element fixes it. I haven't been able to create a test case. I think it has something to do with the fact that the content .foo > .content-container > .content is updated dynamically. Attached is the CSS.
I am also seeing this with the current WebKit build on http://qz.com, in the queue list on the left.
This appears resolved in the latest.