but its not gonna restore back to 4.3.3, it will restore to 4.3.5(the latest version)..... on the iPad 2( only 4.3.3 is jailbroken)
only way to restore to 4.3.3 is if you saved your shsh blobs for 4.3.3, using tiny umbrella(TU).
basically, if you don't have shsh blobs saved, don't restore if you wanna jailbreak again right now, once you go 4.3.5, can't downgrade to 4.3.3(without saved blobs).