In Timeline, when in "frames" mode, event disclosure arrows are rendered below the dividing lines for the frame (div.timeline-frame-divider). When this happens, the frame divider can capture mouse clicks and make it difficult to open the disclosure arrow. See original issue for more details.
Created attachment 172062 [details] Patch
(In reply to comment #0) > See original issue for more details. Can you provide a link?
(In reply to comment #2) > (In reply to comment #0) > > See original issue for more details. > > Can you provide a link? Link is provided in "URL" field.
Comment on attachment 172062 [details] Patch Clearing flags on attachment: 172062 Committed r135518: <http://trac.webkit.org/changeset/135518>
All reviewed patches have been landed. Closing bug.