I am having the same issue. The playbook lets me know when a bbm has come in but when i launch the app it is just a white screen with a green rotating wheel and some function buttons below however there are no contacts whatsoever and I've left it over an hour thinking it was because i had 500+bbm contacts. I've tried every combination of unpairing/repairing, reinstalling bridge, os and bbm software. I'm at my witt's end as well.