iPhone 4 GSM @ 4.01 unlocked 01.59.00, having issues, should I (Can I) go to 5.0.1?

So my iPhone 4, which is on 4.01, unlocked BB 01.59.00 with ultrasn0w.. I'm having some software issues, especially with Cydia. Its been well over a...

puts the internet to work for you. via task 358721