It's definitely the website.
If you have iOS 4.3.5 then simply restore to 4.3.3 as long as you tapped on "Make My Life Easier" within Cydia when you were on 4.3.3
This is a tethered jailbreak so if you reboot you will temporarly be unjailbroken until you open the jailbreak software and perform a tethered boot.
Jailbreaking simply adds Cydia to your iPhone. Unlocking simply allows your iPhone to be connected to other GSM networks like T-Mobile.
Best Cydia Apps and Best Cydia Tweaks
There used to be a thread but I couldn't find it. I compiled this list and wanted to share it with you all....
Separate names with a comma.