Hi guys, I am so pissed off by my last month's bill cuz there are $30 charged for excessive data flow. I found most of the data occurred by "mobile browser" and some of their connection time are over 2000 mins which is impossible! I am using wifi at home and school but some programs (e.g. safari) are sending and receiving data in the dark background thru cellular data while I'm ON WIFI. WTF!!! Today I cleared all the usage and opened safari while I'm at home on WIFI. Somehow there were 0.7M appeared as usage on Cellular DATA!!! WHY??? Can anyone tell me WHY some ******* programs tend to send data packets thru cellular network other than thru darn WIFI network???!!! Now I want to disable all background multitasking but I CANT!!!!!! I am so frustrated by iPhone and iOS 4 now!!! Is it just me? or it's some cheesy settings that I need to be aware of??? Can anyone help? Thanks.