>   bt0: mbi at 0xf86aa954 should be found, stat=81..resync

>   Can somebody tell me what these mean?  dmesg output below...and the card 
>   is a bt946...

>It means you got an incoming mailbox interrupt, but no incoming
>mailboxes were full.  This *could* indicate a cache coherency problem,
>but if your machine works otherwise, it's more likely that it's just
>because of a (perfectly legitimate and unimportant) race condition.
>The message should probably not be printed by default.

I also got these after upgraging from a bt545 to a bt445. The rest of
the system stayed the same.
-- 
Heiko W.Rupp        Gerwigstr.5        D-76131  Karlsruhe    +49 721 9661521