Hello Webkit-Team, latest Webkit (r40777) crashes when I hove with the mousecursor over a link (and the popup comes up) on the following website: http://www.opportuno.de/stellenangebote_sap_inregionsiegen%20(57...).html Thank you in advance. Mehmet
Created attachment 27485 [details] crash-log
Confirmed as a regression with r40827.
<rdar://problem/6573250>
Created attachment 28109 [details] Reduction (will crash)
Created attachment 28112 [details] Move code to invalidate z-order lists on style change from RenderBox to RenderBoxModeObject
Fixed in <http://trac.webkit.org/changeset/41317>.