Never gave me issues, when i got my N900 it came with pr1.1 from the box, pr1.2 was already avaible, OTA went without a hitch, then when pr1.3 came you HAM didn't wanna do it and tried to trick me into doing the upgrade with OVI Suite, which from what i've ****s things up way more than the messages usggesting you use it indicate, i didn't fall for it, i upgraded using Maemo Synaptic, didn't had any issues this time either