While viewing a Google Video (this one in particular, linked from /. :-P) I clicked the 'Back' button and received a crash. I also crashed with rev. 16061 by allowing the video to start playing, and then going to my homepage.
Created attachment 10265 [details] Crash log, each crash reproduces this exact call stack
Created attachment 10266 [details] PowerPC backtrace Backtrace from r16068
The following assertion is triggered by this bug: ASSERTION FAILED: dataHandle (/Users/andrew/Documents/WebKit-svn/WebCore/platform/DeprecatedString.cpp:586 WebCore::DeprecatedString::~DeprecatedString())
Reproducible crash and regression -> P1.
Fixed. *** This bug has been marked as a duplicate of 10852 ***