My ScrollbarPainters are going away on a regular basis, but they shouldn't be. smfr thinks ScrollingStateScrollingNode should retain them while it's got them, and that does preliminarily seem to help. <rdar://problem/15906263>
Created attachment 222403 [details] patch
Comment on attachment 222403 [details] patch Clearing flags on attachment: 222403 Committed r162915: <http://trac.webkit.org/changeset/162915>
All reviewed patches have been landed. Closing bug.