Mike,

Usually bent pins indicate that the hole is sized too small. Since PWB
manufacturers monitor the plating thickness by the smallest hole, you may be
getting additional plating in the press fit holes. This small amount of
additional plating may cause the hole to be sufficiently small enough to bend
the pins at insertion.

Also, check your hole size. The corners of teh pins are designed to just
touch the laminate material, not dig into it. The copper displaced, forms the
gas tight connection. If you are sizing the hole to cut into the laminate
material, than you are certainly sizing it to cut into the copper at the flat
of the pin. 

Regards,

Gary Ferrari
Tech Circuits