Test_20100411_Vdubtestrgbcube4secs_ifps.ogv with empty thumbnail
Between 03:23, 8 April 2010 and 08:40, 9 April 2010 new video uploads started to render with empty or corrupt thumbnails (Firefox, Google Chrome, Opera and Safari, with cache and file purging; thumbtime also tested). New uploads are still rendering incorrectly. I *believe* I have eliminated file corruption because the file uploaded is identical to the file on my PC (I download the file from mediawiki and use emacs to compare).
Duplicated problem on skins: Monobook, Vector and Classic. Other skins not tried.
How to replicate:
1: choose any small video from Category:Calibration videos at http://commons.wikimedia.org/wiki/Category:Calibration_videos and download to computer
2: upload same file with name prefixed with "Test_reupload_"; click the "ignore warning and save anyway" button
3: see the corrupt or empty video thumbnail
Example attached from: http://commons.wikimedia.org/wiki/File:Test_20100411_Vdubtestrgbcube4secs_ifps12fr12_q10.ogv
OS: Windows Vista