Thread:Project:Support desk/Special pages broken after upgrade to 1.24

I have just moved my mediawiki 1.15 installation over to a new server and upgraded to the 1.24 version.

PHP version 5.6.0; MySQL version 5.6.21

The upgrade seemed to go smoothly, with some expected problems. I had to remove StartProfiler.php; I had to remove old skins; I removed the out-of-date extension FCKEditor; the AutomaticRemoteUser extension does not seem to be working. I can worry about the extensions later, though.

Right now I can view and edit pages OK, which is why I say the upgrade seems to have gone fine.

However, none of my Special pages work! They all give an error similar to:

Any help fixing this would be greatly appreciated.

Thanks!