[TxMt] Xcode showing invisible characters

I know this is a bit off topic, but im guessing some of you are avid xcode users also. So here is my pickle, a couple of days ago the editor in xcode started to show normally invisible characters, like tabs and linefeeds, exactly like when you toggle the View->Show Invisibles in Textmate. But i can't for the life of me turn it off. The View->Text->Show Controll Characters does nothing. Ive done a complete reinstall and trashing all xcode prefs i could dig up, but no lucks so far. So has anyone a clue what might be the issue here?

Here is a screen of how it looks http://dl.dropbox.com/u/362683/Xcode.png

/Mikael