[cansofspam]

I searched the thread and didn't see this issue, so I'm guessing I'm the only one.
Contacts refused to load for me if I selected the following 3 options in PIM:
HTC Random Access
Inbox menu extensibility
PPCContacts Manager

When I had those three loaded it refused to open contacts... it would briefly show "contacts" at the top, then "crash" back out to the today screen.
As it was late, I didn't feel like reflashing 3 times to figure out if just one was causing it. So I just stripped them all and it works fine.

Thanks for the effort! hope this is helpful for you.