@adx442:
Just to chime in with my anecdotal evidence, I had the same problem with my Alix 2D3 board using a January snapshot, where it would crash within 8 hours to 1 day, and reverted to 1.2.3. I'm now using the 2GB May 2nd snapshot for NanoBSD, and it's been stable on my hardware for about 3 days.
I had problems also with January (and February and March and April) snapshots, but the disable hardware checksum offload trick worked for me (now using May 3rd).