In a Google Reader posts feed, go the next post by pressing spacebar. A small corruption will appear in the number of unread posts. Will attach a screenshot.
Created attachment 20088 [details] Curruption of the number '1 'in "Apple (1)" in the sidebar
"Maybe" I should have mentioned that this is using WebKit SVN r31318
Confirmed with r31371. While spacing through the unread posts, the "All Items" unread count updates properly, as does the unread count for the feed (in the bar above the feed), but the count next to the feed in the feed list in the sidebar does not update at all - forcing a repaint updated it properly.
Created attachment 20166 [details] even more rendering problems with Google Reader
I am seeing a much worse regression with Google Reader which is introduced in last 24 hours, so it might be related to this breakage. See screenshot. "Mark all as read" , "Refresh" is misrendered.
(In reply to comment #3) > Confirmed with r31371. Is this a regression?
In my case, yes its a regression introduced in last 24 hours.
Created attachment 20177 [details] Patch for "even more rendering problems" (without log and test) The extra problems are a regression in r31389.
Comment on attachment 20177 [details] Patch for "even more rendering problems" (without log and test) Landed this in r31426
Created attachment 20184 [details] Patch (no repaint test or change log yet)
Created attachment 20223 [details] Make repaintRectangle() account for layout delta
Fixed in <http://trac.webkit.org/projects/webkit/changeset/31446>.