I'm also affected by recurring crashes, handset UI hangs and application
aborts. My N9 is a black 64 GB model bought in Germany, product code
seems 059J1V4 (taken from /home/user/MyDocs/capability.xml).

Nothing obvious in the syslog. In dmesg i've seen a number of SGX crashes but these do not necessarily correlate with hangs or reboots.

However, i've seen some ECC error messages in dmsg and i've been
wondering if other see the same:

[ 0.138793] onenand_wait: ECC error = 0x8888, addr1 0x52, addr8 0x80
[ 0.138824] mtdoops: read failure at 458752 (8 of 8 read), err -74
[ 0.139068] onenand_wait: ECC error = 0x8888, addr1 0x55, addr8 0x80
[ 0.139099] mtdoops: read failure at 851968 (8 of 8 read), err -74
[ 0.139190] mtdoops: ready 0, 30 (no erase)
[ 0.139221] mtdoops: Attached to MTD device 3

Previous dmesg output had less ECC errors and/or different addresses.
I've also seen other dmesg that has no ECC errors reported.

So i'm wondering if this ECC error indicates a hardware failure.
Does anyone affected by frequent crashes see ECC error messages
as well?