A bug has been identified in Peerunity v1.1 and previous versions when avatar mode is in use.
Avatar mode alters the way change is handled in the client when you make a transaction. The bug causes the change to be destroyed rather than sending it back into the users balance.
A fix has already been submitted to the repo and will be included in v1.2. For now you must not use avatar mode in the Peerunity wallet.