NAV 2011 & MAC OSX Lion

Recently updated my MAC (Intel i& 2.93 GHz) from Snow Leopard 10.6 to Lion 10.7

Having problems with NAV 2011.  Initially, update would not work until I had downloaded a new version of JAVA, then worked fine, but I am not at all convinced that the NAV program is working correctly and auto checking files, emails etc.   I know - not a huge problem with a MAC, but I wondered if any other MAC users had noticed problems or if there are any known issues with NAV & OSX 10.7

Jon