It's up and running again. I have been observing "recoverable ECC error" messages since I bought the phone toward the end of November (originally PR1.1, then PR1.2 since it was released). I don't think the errors have increased in frequency beyond a certain point -- although this is the first occurrence where the display (frame buffer?) was corrupted and the phone had to be rebooted.

Is there an additional resource where I can find out more about what's going on? Is there anything I can do about this? I live in the U.S. and ended up getting a phone with the Singapore/Starhub ROM (059L3V7). Currently, it's running the North Europe (059J187) release.

One thing I've suspected for some time (but evidently have no way of verifying): PR1.1 seemed to run much more smoothly than PR1.2. In general, I had better reception, the UI was smoother, everything ran faster. Of course I can't go back to PR1.1 to see whether the update caused the change, or whether it was the hardware (I've tried PR1.2 with nearly no modifications; it has never been as stable as it was before, but my memory regarding when exactly I started noticing the performance degradation is somewhat hazy).

Not sure whether this is of any significance -- but I've never overclocked the phone (the only time I tried, I happened to be running the patched kernel and Inception wouldn't work right, while Aegis was still sufficiently intact to prevent me from loading/running such things as the OC module/app).