Well Personally, I feel PR 1.2 and PR 1.3 have their own pros and cons. I have noticed that PR 1.3 reproduced a problem I had in PR 1.1.1 like the chirping sounds when a call comes (its scary sometimes makin u feel like oh my answer fast or the speakers will tear up. lol Let me know if this is just me or anyone else facin this issue). The positive side is the RAM Management. PR 1.2 used to hog up the RAM and I needed constant 800 MHz overclockin to keep the phone stable but PR 1.3, without even overclockin, the phone is too smooth.

Overall, I have no complains however. N900 being open source and having so much potential already makes it the best possible phone for me... (Nokia however needs to be a lil more customer oriented... LoL)