ahh sneeza
if u watch 1 and 2 obiwan doesn't actually meat 3PO. if your refering to anakin not recognising him or vice versa the favoured rumour is that 3PO has had a memory wipe and anakin/vader doesn't get to see hin in his gold cladding, as there are many 3PO driods.
and no i had to run a batch job on some backups