Created attachment 47497 [details]
telepathy-gabble error log
Rposody (from git Fri Jun 3 05:36:44 2011 and looks like stable versions as well) doesn't return muc#roomconfig_allowinvites setting but gabble assumes receiving it and fails with creating muc.
Interesting, thank you for the report. I've actually removed invite-restricted entirely in a branch I'm working on (given that you could only ever set that property, not read it, it seems a little useless…) … and actually I removed Telepathy.Properties entirely, replacing it with an API that sucks less. I guess this means that your client (Sugar?) uses Telepathy.Properties, and someone will have to update it …