Careful with Tubes

A student just purchased a Bassman and brought it in to experiment with tube swaps last night. I was changing the power tubes and on one of the power tube sockets, one of holes where the tube tines insert folded in on itself... this is the second time this has happened on a reissue Bassman. It's going into the repair shop today. I don't know if this is just due to cheap Fender sockets (this has not happened with any other amp), but either way, just be careful when changing tubes to make sure that the pins go straight in.