I updated my iPad 2 to 5.1.1 and jailbroke using Absinthe 2.0. The jailbreak process went smoothly and I did not have any problems at first. I reinstalled all my tweaks from Cydia without any issues. However, a day after the update, my iPad 2 doesn't seem to be able to connect to my Wi-Fi network anymore. It is able to detect the network, but it can't join it. No matter how many times I try rebooting or respringing, it doesn't work. As well, a lot of my stock icons on my iPad's screen are turning into white boxes i.e. Contacts, Photos. When I respring or reboot my device, they go away - only to be replaced with different icons becoming white boxes. Is there any way I can solve these issues, or do I have to restore it?