Have there been any new developments on this problem?
http://sourceforge.net/mailarchive/message.php?msg_id=25140766

I am seeing similar (if not identical) behavior from libmpeg2 compiled with the 
mingw64 cross tools for fedora 
(available here http://build1.openftd.org/mingw-w64/)
After disabling gcc optimizations and enabling debug, gdb indicates the crash 
happens in sse2_idct at the first movdqa_m2r.

There are also reports of similar crashes in sse2_idct due to recent gcc 4.6 
changes. 
http://comments.gmane.org/gmane.linux.mandrake.bugs/201430
The patches in this thread fix the problem on fedora 15 where this is 
reproducible, but not for mingw64 builds 
unfortunately.



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