Last modified: 2010-05-15 15:48:23 UTC
Uploading new images sets mime type to application/x-archive and dimensions to 0x0.
If I set the right mime in database manually (image/jpeg + height width) it works fine.
The problem started when my host upgraded to php 5.
I have the same problem on a 1.6.8 site on same host.
PHP: 5.2.1 (apache2handler)
Check the FAQ regarding file detection, and post to the mediawiki-l mailing list if the problem persists.