I'm having the opposite experience. I'm also running Gingeritis 1.2, and I started off with the MR2 OTA radio.
Ran fine, no reboots, no problems at all for the first 36 hours. I then received my first random reboot.
Then I experienced two strange audio lockups. I received a text (I use Handcent). My phone vibrated, but did not play the notification tone. I pulled it out, hit the volume rocker to make sure the volume hadn't gotten turned down somehow, and it wasn't, it was at full. However, I didn't hear the boink noise it makes when you adjust volume. Then I went into settings, audio, and volume, and the phone froze. I was able to hold power and reboot. This happened twice in 30 minutes.
Later that evening, I went to wake my phone, and it was totally unresponsive. Even tried plugging in the charge cable and the LED didn't light. Pulled the battery, then it fired back up okay.
I decided to flash the leaked radio from the base this is built on to see if it fixed the problem. I experienced half a dozen random reboots in the meanwhile.
After flashing the radio, I rebooted. I had two voicemails left for me in the meantime, and it notified me upon booting back up. I deleted them, but couldn't get rid of the icon in the status bar, so I rebooted again. This time, it went past the boot animation, and when it would normally come up to the lock screen, it froze. Totally unresponsive, screen off, same as happened to me on the other radio. Pulled the battery, and it booted back up fine.
I've experienced at least 2-3 random reboots since this incident last evening. I really like this ROM, however it seems to be getting more unstable as time goes on. I'm pretty disappointed about it.
I'm thinking about perhaps wiping and reflashing to see if the problems return after some time. I should note that I haven't installed any of the MODs either.
Edit: I never received a random reboot, or any of the problems I've been experiencing on a stock rooted MR2 OTA ROM.