How to make Synaptic proceed past unknown-sig and unsigned packages?

SuSE 9.1 Pro. Synaptic says Error Apt system reports: Error(s) while checking package signatures: 104 unsigned package(s) 68 package(s) with unknown signatures 0 package(s) with illegal/corrupted signatures So I went back through the process and UNchecked the box that says to verify package signatures. Nope. Same error. What does Synaptic want? How do I make it get past the announcement about signatures and apply the packages? Isn't unchecking that box supposed to be the same as using the -- nocheck option in apt? Kevin