Forum:Sitenotice not showing up for anon users without purging cache?

I've been reading (1, 2, 3) about MediaWiki:Site/Anonnotice and I tried setting up a Sitenotice on the A Dance with Rogues wiki, but the notice appears to be cached for anonymous / logged out users. I see the notice everywhere when I'm logged in, but I have to purge the article's cache to see it when I'm logged out. MediaWiki:Anonnotice is the same. I assume this must be some type of bug in MediaWiki, otherwise the notices would be mostly useless for anonymous users. Is anyone familiar with this? Thanks. --Superlgn 19:56, October 9, 2009 (UTC)
 * Already tried emptying your cache? Mark (Talk) • (Contribs) 21:27, October 9, 2009 (UTC)
 * Browser cache? Yeah, I even created a new Firefox profile to make sure there wasn't something else at play. If I go to the main page logged in, I see a message. If I go there logged out, nothing. I can do this on other articles too and action=purge fixes it. --Superlgn 21:42, October 9, 2009 (UTC)