When using Firefox 4 with a Dell Photo 720 printer, going straight to print works fine, but accessing "Printer Properties" (from the print menu) show the error message "Function address 0x0 caused a protection fault. Exception code (0xc0000005). Application property sheet pages may not function properly" and only shows part of the normal window.

If I try to change anything, Firefox 4 crashes. This wasn't an issue in version 2.x - 3.x. Is there something that I can change within Firefox, or is it a question of updating the Dell drivers? Nothing is displayed, but there is a button marked "change". Pressing this causes the crash; it will print on the standard settings.