besides the problem opening text files I've also seen some program icon duplications in the programs list... calculator, camera, and psSHUTxp.
As far as battery life it seems fine so far.
As I mentioned earlier there is a noticeable lag in loading programs at times (as compared to other custom roms) but it is purely speculative and I have no data to back it up
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However, I do see some video locking up here and there and have been able to reproduce it with the ICBM game... basically go crazy firing missles after round 3 and you will be able to see lockups that can last a few seconds.