There have been 2 issues that have been identified already with ZCB BETA 3 and I am going to be working on these to try to release a patch in the next couple of days. There is a work around for 1 but the other needs to be fixed in code.
Here are the bugs:
Bug 21924 – BB: Installer fails with no error msg if mapi32.dll is in use
If you seem to hang while trying to create the BlackBerryManager or BlackBerryServer profiles, you are probably running into this bug. The work around is to run \windows\system32\fixmapi.exe. I'll be making changes to the installer to work around this issue.
Bug 30918 – BB: CalHelper not happy with long email addresses
This bug indicates that users with very long email addresses (longer than 42 characters) will have problems with meeting requests. I will fix this and it will be part of a patch.