Hi just upgraded to a Bell 7250 as we just gave up on error code 507 on the
6750. RIM said send it back which I have done.

Had a heck of a time getting the thing running properly - ended up reloaded 3.6 service patch3 OS becuz the RIM guys said there are some bugs in the 4.o software.

Would like to take advantage of 4.0 Is anyone else aware of these problems - any ideas ?

I'm running with 4.0 on my bell 7250 and haven't had any problems. I even use a BT headset with 0 issues.
v.4.0.0.204 (platform 2.0.0.28) which came on it when I purchased it.