I've had mine for a few weeks now but due to so many other things going on in real life I've only just got a chance to really start playing with it...
Anyway, I started out by flashing Clockworkmod using Odin, from
http://forum.xda-developers.com/showthread.php?t=1118693
That was fine, so I then made a full system backup.
Played around with flashing a stock kernel back (
XWKE7 Stock Kernel: http://www.multiupload.com/HMN4GUKBPS md5: 3BC006663F23432D2219DFA45D7AAD13 Password is: intratech@XDA) from
http://forum.xda-developers.com/showthread.php?t=1075278
This too was fine.
I then thought I'd try and flash a stock firmware, just to remind myself of what a completely unmodified system is like (though I hadn't flashed any custom ROMs, I had tweaked the UI, adding WidgetLocker and LauncherPro). For this I tried both "CWP UK:
http://www.multiupload.com/U1WNFZ88L0 MD5: A5A59AE6374C7FC814E8901B40F7C8AA" from the above thread and "Generic XEU:
http://www.multiupload.com/IBRBHDUDXI MD5: F388DB98FC83861C2F22E607AE940DBB".
It's not clear which one I should be using; mine is a SIM free UK handset. Anyway, it turns out that neither seem to want to work. I flash them using Odin, with the PDA file set to the relevent tar file linked. The flash completes and my phone reboots, but then it just seems to be stuck in a loop with the Galaxy S II loading animation (I think the maximum I waited was around 4 minutes). So it seems neither ROMs work. Am I doing something wrong? If so, can anyone advise?
For now I've just reflashed ClockworkMod and recovered the backup I made, so my phone's fine. But I'd like to figure out what's going on. Once I've done that I'm going to give the Cognition and Lite'ing ROMs a try.