This is the results of running xscreensaver in a terminal and hitting the settings button
$ xscreensaver xscreensaver-settings: 11:59:12: X error: xscreensaver-settings: Failed request: BadMatch (invalid parameter attributes) xscreensaver-settings: Major opcode: 42 (X_SetInputFocus) xscreensaver-settings: Resource id: 0x1a00003 xscreensaver-settings: Serial number: 435 / 436 -Luke