Board Thread:Support Requests - Getting Technical/@comment-1392407-20130427134655/@comment-10688548-20130427224153

Er, it's worth notice that placing it at MyPage/wikia.css on this wiki will only affect Chat on this wiki.

If you want CSS to apply to some other wiki, you'll have to place it at the equivalent page on... some other wiki. Or, place it at Special:MyPage/global.css here to affect all wikis you view.