If you have a german client there is a bug with the Prat PlayerNames Module and using the tab-completion. There is a command "/küssen" in the german client (/kiss) but if you use the tab-completion to complete /kü or /küs to /küssen the tab-completer is going to the PlayerNames either started with S or displaying all PlayerNames. So you will get sth. like /küSzilvy. It looks like the AceTab doesn't recognice the umlaut ü as part of a word and only see sth. like "/k " (notice the space after 'k'). And then the completer is started, going in this case to all playernames (which let laag the wow-client for several seconds btw...) and shows me a list of all playernames. I don't know if it is a bug in AceTab or Prat, so I posed it here.