Wirelessly posted (BlackBerry 8700g: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) BlackBerry8700/4.1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/100)
The BB OS is rock solid! If you are having reboot issues you either have a corrupt install or an aftermarket software that is corrupt. If you are proficient with BB do a -usb wipe via javaloader and reinstall the OS.
As far as the browser bookmarks you can't change it.
I hope this was at least a little helpful.