From 11.04 on, Ubuntu has an overlay scrollbar. This can interfere with tests, because the overlay scrollbar has different metrics than the one from the default GTK theme.
Created attachment 91936 [details] Patch
Comment on attachment 91936 [details] Patch r=me
Comment on attachment 91936 [details] Patch Clearing flags on attachment: 91936 Committed r85487: <http://trac.webkit.org/changeset/85487>
All reviewed patches have been landed. Closing bug.