There was a little bug in yesterdays PREFIX handling, which meant that it didn’t work well when connected to more than one server (One servers prefixes overwrote the others)…. Fixed now.
Also I have enabled logging on channel kicks. I know some people use these as joke, and may get kicked quite a lot, but they are also a bad sign in terms of abuse.
If you get kicked a lot, try not to. Otherwise you may have your access to Mibbit blocked.
Likewise, if you are a chanop and see someone being abusive, make sure you kick them from the channel as well as ban/g-line/etc. That way Mibbit knows that user is misbehaving.