So, discovered after upgrading to 1.7 that it will no longer connect via TCP/IP - and since I have no BIS or BES (carrier doesn't support it), Facebook won't work. Tried downgrading to 1.6, but get the notice "sorry, your device doesn't meet the system requirements that are needed to support facebook". Since I have a 8900 running 4.6 (and was running Facebook 1.6 until this morning!), I highly doubt this is the case.
Had to remove Facebook completely and now have no way of getting it back.
Does anyone know where I can find the 1.6 files? cheers!