Hi, Ive been having this problem for a while, just tollerating it. Ive searched for some ideas on how to fix it, but I havent come across much. I have a 8gb jailbroken to 1.1.2 It will lockup with I do the double tap at the top of the screen, to quickly scroll up to the top of web pages. Also, when pressing the back button it seems to do this also. Ive tried to uninstall apps that I dont really use much, hoping it would be a conflict with an app, but not luck. I also uninstalled summerboard but that did not help. This was one suggestion I found. Any suggestions on how to figure this out? Im at the point where I might just upgrade to 1.1.4 not jailbroken to see how that works in terms of stability, and worry about jailbreaking latter. I honestly just use the thing for music and occasional web browsing right now. jailbreak is something I can live without for a few weeks until this gets sorted out.