Try resetting your network settings. Settings, General, Reset, Reset Network Settings. The only info lost is passwords for any wifi that you have already stored.
I can be watching anything and it goes down, I then have to reboot it, if it's Facebook it goes back to the beginning and I have to scroll down to where I left off.i have tried what Jomlett suggested but to no avail.
Try resetting your network settings. Settings, General, Reset, Reset Network Settings. The only info lost is passwords for any wifi that you have already stored.