
I've had that same problem before but not at the moment. The only way I fixed it was with a combination of uninstalling FFoR, uninstalling the print driver, reinstalling print driver then FFoR. You could also try reinstalling Java run time environment on your machine amongst the other steps.
I never found an exact answer. It seemed to be a random combination of actions and the fact that Buhallin switched on Java debug the last time it happened, which theoretically shouldn't change anything with printing.
I suspect there is some bug going on with the Java library used for printing.