There's a warning without any header text when uploading some (possibly most)
files to various mediawiki projects.
http://de.wikipedia.org/wiki/Bild:Warning-but-no-reason-given-after-upload.png
is an image showing the situation. Courtesy of Bdka.
The problem started to occur as early as August 20 2005, 20:00 UTC.
Version: 1.6.x
Severity: normal
URL: http://de.wikipedia.org/wiki/Bild:Warning-but-no-reason-given-after-upload.png