NIS 2012 problem with multiple logins for the same app

I've just upgraded to NIS 2012.  I have 2 yahoo email ids and when moving from one to the other (logoff first id, try to login to second id), identity safe puts rubbish in the username and I can neither delete it nor overwrite it (it looks like a long string of little square boxes) and selecting the correct id from the identity safe dropdown has no effect whatsoever.

 

The only way to get rid of it is to clear cache and cookies, close the window completely and re-initiate the app and then all is well.  This has to be a bug.

 

I have 2 screen shots but this board won't let me load them.  Available on request. 

 

I'm really sorry I upgraded now, this is annoying.