This is an old problem with animation not working on this site http://radar.weather.gov/Conus/full_loop.php What is different is the first time I tried with this build WebKit-SVN-r38860 the site loaded with out the additional blue screens but the animation worked. The next time Iaunched the same site animation no longer worked and has not since.
I am using WebKit-SVN-r39060 Again the first time I launched http://radar.weather.gov/Conus/full_loop.php animation worked as it should again. After quitting Webkit and restarting Webkit the next launch of http://radar.weather.gov/Conus/full_loop.php animation continued to work. Then I launch another site and returned to http://radar.weather.gov/Conus/full_loop.php. This time animation no longer worked.
WebKit-SVN-r39090 is very slow to launch Animation still does not work
Animation for this site still does not function using WebKit-SVN-r39469
*** This bug has been marked as a duplicate of 22995 ***