[Len Case]

The behavior you are getting sounds like what would happen if an exception is being raised--please check your console and see if anything is being written to it (/Applications/Utilities/Console.app).

Additionally, are you running in German? If you are, what happens if you quit Outliner, switch to English, and run it again? Does the URL or the text your are typing have any non-ascii characters (umlauts for example)?