Reproduced on Symbian^3 using QtTestBrowser robot mode. The browser would crash while loading the next page on a hung or not finished page.
Created attachment 68214 [details] Stack trace
Created attachment 68216 [details] Patch
Created attachment 68217 [details] Patch
Comment on attachment 68217 [details] Patch r=me
Committed r67951: <http://trac.webkit.org/changeset/67951>
Revision r67951 cherry-picked into qtwebkit-2.1 with commit 6160419 <http://gitorious.org/webkit/qtwebkit/commit/6160419>