Last modified: 2011-12-12 19:19:20 UTC
It calls a function gM, which is probably defined somewhere in UW, but not in core. I think it could be replaced with mw.msg, if this is correct please do so, otherwise move that module back to UploadWizard.
It seems "gM" exists in jQuery 1.3.2 I've just killed MultiLingual LiquidThreads I think it's done with a bit of vodoo.. window.gM = mediaWiki.language.getMessageFunction( options ); Yes, it looks to come from MWEmbedSupport, jQueryMsg (I believe this is wanted to be moved into trunk soon) and UploadWizard Quite a few extensions seem to be using it too...
See r105646, it seems to currently be work in progress
Ah, sorry, I thought the gM() alias was still in use in prod. It was superseded by mediaWiki.msg(). I'll fix it.
fixed in r105918