Safari insists on displaying a horizontal scroll bar on a lot of washingtonpost.com pages despite no content overflowing. Resizing the window doesn't get rid of the scrollbar. This page, for example...
The reduction for this is:
<div style="width:100%; position:absolute;"></div>
Created attachment 46405 [details]
Updated a couple test results for progressions this fix causes.
Comment on attachment 46405 [details]
Fix was landed in r53168.