Created attachment 71441 [details] Simple application showing the issue When a page is not defining a background color, the rendering of the background is incorect when tiling is used. The attached file show a page not rendered correctly when tiling is enabled.
Created attachment 71453 [details] Patch
Created attachment 71465 [details] Patch Right now it's too complicated to autotest TBS. it's a whole different task that's mutually exclusive from this fix.
Comment on attachment 71465 [details] Patch Good catch. One more of these cases where QPixmap's lack of default-initialization bites us somewhat.
Comment on attachment 71465 [details] Patch Clearing flags on attachment: 71465 Committed r70262: <http://trac.webkit.org/changeset/70262>
All reviewed patches have been landed. Closing bug.