I guess you know that 4.1 is not as reliable at 4.0... But just in case this link to give you an idea... Let's say that we decided to stay with 4.0 after a talk with RIM support that would resume to: Well if you need the new feature go we will support you... if you dont really need them... well 4.0 does work pretty good hmm? :P
http://www.blackberryforums.com/bes-...periences.html