For a few days now we've been getting cronspam like this:
Cron <www-data@labweb1001> /usr/local/bin/mwscript extensions/TorBlock/maintenance/loadExitNodes.php --wiki=labswiki --force > /dev/null Could not load exit nodes.
I'm not sure what the correct behavior for this is on labweb* but I suspect these errors are due to recent changes in the extension.