Thread:Project:Support desk/Cannot upload files since the update from 1.22.7 to 1.23./reply (3)

https://git.wikimedia.org/blob/mediawiki%2Fcore.git/REL1_23/RELEASE-NOTES-1.23 which is referenced in http://www.mediawiki.org/wiki/MediaWiki_1.23. File uploads were working beautifully in 1.22.7. My hosting provider hasn't changed anything, so what could be the problem?