Installed Exchange 2007 SP1 with BES 4.1.4 MR3 and have not had any problems thus far. We just got BES two weeks ago, and without thinking of checking RIM's site first I upgraded to Exchange SP1. We have been waiting for Exchange 2007 SP1 features for almost 6 months..like exporting a mailbox to a .pst. Just wanted to chime in and share my experience.

BlackBerry Manager
Version 4.1.4.19

See Attachment for a screenshot of file versions.