TweetDeck artefacts

Ever since August 2008 when I made the switch, TweetDeck has been Twitter for me. For people following hundreds of fascinating people categorised into lists (formerly TweetDeck groups) there's absolutely no better ways to use it, even if it does run on Adobe Air. Problem is, no matter what Mac I'm using it always "remembers" those red dotted lines denoting bad spelling.

Perhaps it's just poking fun at the fact I make sppelling mistakes.