GPS Issues w/ Upgrade

[tsperez]

I just got a new phone from Sprint (Mogul) and have started my upgrade process. The phone came with 3.35 ROM and radio 3.42.03 and PRL 60610.
I upgraded to ROM 3.56.651 and had no issues. I then updated both the PRL to 60613 and radio to 3.42.50 at the same time. Now I cannot get GPS locks with LS nor Garmin XT. Is it the radio causing this problem? So many have reported .50 as being very good but not for me.
Any thing I should look out for or do I go back to the older radio version?

TIA,
tsp