Open "Show all bookmarks" in Safari and drag a bookmark from the list to the tab bar. You'll get the following assertion failure with r19183 and Safari 2.0.4: ASSERTION FAILED: m_frame->document() (/Users/matt/Code/WebKit/WebCore/page/EventHandler.cpp:986 WebCore::MouseEventWithHitTestResults WebCore::EventHandler::prepareMouseEvent(const WebCore::HitTestRequest&, const WebCore::PlatformMouseEvent&))
Created attachment 12702 [details] Crashlog
<rdar://problem/4960109>
I cannot reproduce the bug with r19707.
I can't reproduce this anymore either.