You might want to check this out: BlackBerry Search Results
The Cause 3 heldped me with the same issue.
On regard the other porblem what I did was to go to the Synchronization settings and on Configure PYM uncheck the option so syncrhonize Calendar. After that I tried to synch my BB again and it didn't come up with the error message so I just check my calendar for problems with my recurrence meetings and deleted them and it worked fine after that (remenber to select your calendar on configure pym after that)
A co-worker had the same problem what he did was to change MS outlook insetad of Wireless on the synchronization settings (Configure PYM) on the calendar. After that he synchronized and the problem was gone.
Sorry for my English... Hope this can be for some help...