Last modified: 2008-10-06 08:18:00 UTC
OGG videos with extension ogv don't thumbnail, see e.g. [[Wikipedia:Featured picture candidates/Propaganda of the Spanish American War]]. The search http://en.wikipedia.org/w/index.php?title=Special%3ASearch&ns6=1&search=.ogv&fulltext=Advanced+search might shed some light on the problem. Possibly similar to bug 14524. Sample files: *[[:Image:Shooting Captured Insurgents - Spanish-American War.ogv]] *[[:Image:Wikipedia - Mitchazenia video.ogv]]
Fixed in r41735 and live now.