I have two iPhone 3gs , according to the tutorial the phone which older than week 40 should have new bootroom. But my iphone 32gb (week 46) black version still got [IBOOT-359.3] which is old bootroom , my 16gb (also week 46) white one have new bootroom [IBOOT-359.3.2] though. it kind weird lol
See the "Location" service in purple arrow on the iPhone taskbar? Some Apps that use location services sometimes end up continue to have that on, especially Apps such as Trapster and other GPS enabled app. You will see your battery level drop from 100 to 0 within a half hour to an hour. iOS4 is very buggy and requires alot of attention from Apple. I assume they will be releasing the 4.0.x patch pretty soon.
Also there seems to be Push Notifications issue where you will not receive any Push Notifications once you Jailbreak/Unlock. I do not know if this seems to be because of Pwnagetool or ultrasn0w.
Sometimes when you load any app, it will crash and then you have to try to load the app again. These are some of the common issues with iOS4.0
If you like this post and find this tutorial helpful click here: http://www.hackint0sh.org/reputation.php?p=578233
Your last information seems quite clear, as I've meanwhile restored to iOS4 BEFORE reading your post. Guess I'll have to wait now until the DEV-Team publishes the promised solution