Created attachment 53034 [details]
1. Go to http://trailers.apple.com/trailers/focus_features/thekidsareallright/
2. Click on "Watch Now".
2. Video window opened. No video was loaded. After a few seconds WebKit crashed.
Thread 12 Crashed:
0 libSystem.B.dylib 0x00007fff83094b17 asl_close + 19
1 com.apple.SystemConfiguration 0x00007fff8017eb25 __SCThreadSpecificDataFinalize + 30
2 libSystem.B.dylib 0x00007fff8307ffc8 _pthread_tsd_cleanup + 82
3 libSystem.B.dylib 0x00007fff8307fc7c _pthread_exit + 147
4 libSystem.B.dylib 0x00007fff8307f769 thread_start + 13
2. WebKit does not crash.
When there is an unreproducible one-time crash, please just submit it to Apple via a dialog that appears automatically. It's unlikely that we can do anything about it without more information.
CC'ing media folks, as they might have some insight nonetheless.