Firstly, Viber not working for me.

Social Hub is... buggy. I can't seem to login to it at all.

The fading transition on Talk was annoying (not screen fade, more like when suggested words bar appear and disappear from keyboard, the whole screen moves along, in fade transition instead of immediate. You'll get what I mean when you use Talk + Swype).

Account & Sync list lag badly when I have many items there, which I don't understand why. Don't think I ever notice that on GB 2.3.5 the last time I had it on i9100.

When the phone's screen is off, but before it's locked. I press on Home button to bring up the screen, it displays the task list. I believe it's the lag that causes the Home button to registered as "long press" (call up recent task). Or maybe I was using the Season Zen HD live wallpaper which causes the phone to lag?

Standby with wifi connected, BT on, GPS on, battery dropped from 100% full charged (with phone off) to 88% in merely 2 hours+.

Setting Wallpaper (2 options of wallpaper, I dunno why? TW screwed up?) would FC (Get this message: Unfortunately, Gallery has stopped. with OK button) at the wallpaper type selection screen.

2 cases of sudden power off (without shutdown screen/animation).

I think the list would go on if I dig further.