I use version 1.16.2, PHP 5.3.3 (cgi-fcgi), MySQL 5.1.52 for more than a year already. Out
of a sudden all attempts to create preview images (no matter whether I use
"thumb" or another parameter) result in an error message: "Fehler beim
Erstellen des Vorschaubildes," New original files are not affected, but no smaller
versions are shown, even on file-pages! Strangely, the same error does not occur on a
backup version of the same wiki on the same server. Also, I did not change any settings in
LocalSettings.php. Last time the Wiki worked as it should is only a few days ago.
Any suggestions?
Thank you
Bernhard