I allow anons to upload images to website and it works correctly. The recent changes lists the uploads as expected. But special:log doesn't list anons uploads, only registered ones. I checked if they are logged in the database table - and they are, so I guess the software is simply filtering anon uploads. How can this be changed? I have the old v. 1.15.1.
Topic on Project:Support desk/Flow
You first should update the wiki to a supported version. These currently are 1.23, 1.27 and 1.28. 1.23 and 1.27 have long term support with 1.27 being supported two years longer than 1.23.
I think there might be a way to change what Special:Log is displaying using a hook. I have checked the available hooks, but at least on a quick glance I could not find one, which would be run inside that special page so that you could change the SQL query from there...
Regarding the upgrade, I am afraid an upgrade will cause more damage than good. I have a custom CSS design (which will probably break), custom JS (which will probably not work properly) and Extension:AWC's Forum (which is now obsolete, which means I might loose all the data stored in the forum). I am not a programmer and the site is free so I can't afford to spend any money on such an upgrade, unfortunately.
I was actually thinking of a fix to the PHP file which displays the log, but I don't know what that might be and couldn't find anyone with the same problem (obviously, anon uploads isn't popular).