I'm having some really big problems with my N900, and am wondering if these could be overclocking/kernel-power v49 related.

The problem is that the opt partition becomes corrupted. A lot of badblocks according to dmesg. Reflashing the original firmware doesn't help. The problem occurs soon after again (And appears to become worse: re-occurs much sooner now than after my first reflash attempt).

I think it started around the time that I experimented a bit with:
- kernel-power v49 in extras-devel (with overclocked DSP profile).
- busybox-power.
- CSSU testing.
But I also dropped my N900 around the same time rather badly.
My N900 is also over 2 years old and heavily used (a lot of reflashing etc.), could it be just "normal" wear of the flash memory?

I will try to relocate the partitions on the internal MMC to avoid the bad blocks by connecting the N900 to my ubuntu desktop with backupmenu (USB mass storage mode), seems like the only possible solution to the problem. But other then that I'm out of ideas to solve it.

I think the most likely cause is either the drop of my n900 or wear of the flash memory, but would like to rule out negative effects of overclocking/kernel-power v49 a bit more.
Does anybody else have memory corruption problems after using kernel-power v49?
Do you agree that wear of the flash memory or physical damage (dropping the n900) is a more likely cause?

I also found a few other topics on TMO about similar problems:
http://talk.maemo.org/showthread.php?t=44203
http://talk.maemo.org/showthread.php?t=80717

I'm asking because I do have a second N900 to replace a possible defect device, but would like to make sure that that device lasts at least as long