Dear list, a quick search through the list archives didn't bring up a result so please excuse me if this issue has been solved already. I am currently using Mediawiki 1.9.2. and experienced problems uploading PNG images. Although my test image shows an 'image/png'-mimetype with 'file -i', Mediawiki keeps saying the file was corrupted. Monitoring /tmp/php* while uploading the image again shows the uploaded file to be image/png, too: while(usleep 1); do file -i /tmp/php*|grep -v "ERROR"; done /tmp/phpksjpPO: image/png Mediawiki debug says MimeMagic::detectMimeType: magic mime type of /tmp/phpcDoKKE: text/plain amongst other things, so I guess MimeMagic isn't working correctly.. Searching the meta wiki gives me the hint to add $wgMimeDetectorCommand = "/usr/bin/file -bi"; to LocalSettings.php as a workaround, which actually does the trick. But still I wonder: What's the problem with MimeMagic? Thanks, Sebastian