2 thoughts:
Have you ever opened and/or played with the Sprint Hotspot since flashing Froyo for the first time? This has known to cause major problems. If you did change anything in the Hotspot and restored a backup, those changes could be the culprit. If this is the case I would try wiping and installing the Clean Version of TER v1.5 to test.
If you have never opened the Sprint Hotspot on Froyo, then try flashing this zip in Clockwork. It includes the data/settings from my phone. Since I've never had a problem, I'm hoping it will overwrite whatever is causing your problems.
I never touched the hotspot. Even if I had, I did go Odin back to froyo, one click root + cwm3, to TER 1.5 Clean. I don't know where else to go from there. I just ran your zip and I'm still getting the same thing.