just flashed it and had a weird little hickup there
i pressed start in odin and it started doing its magic. once it got to the rebooting part i only got the "samsung galaxy" splash screen without the cylon progress indicator thingy. i waited for a few minutes and nothing happened, the phone was totally unresponsive
so i took the battery out, went in to download mode and odin'ed again, exactly the same as the first time, except now everything went fine...
gave me a bit of a scare, but i'm running k4
now for the dubious settings restoration...