supertux changes screen resolution on shutdown

[cabz]

I recently installed supertux on my edbuntu 11.10 laptop. the game runs fine ,but on shutting it down it changes my screen resolution to something like 640x480 . considering this is not an optional resolution for my pc it is odd.also when the pc is set at the 640x480 the menus are also enlarged so I cannot change the size back to normal . I have to reboot every time.
I ran a terminal window the second time I played it and this is what I got

cabz@cabz-Presario-M2000-PX392UA-ABA:~$ supertux
Datadir: /usr/share/games/supertux
Warning: Unable to open the file "/home/cabz/.supertux/config" for read!!!
Warning: No joysticks are available.
loadgame: /home/cabz/.supertux/save/slot1.stsg
Enter the current level: world1/level3.stl
savegame: /home/cabz/.supertux/save/slot1.stsg
X Error of failed request: BadValue (integer parameter out of range for operation)
  Major opcode of failed request: 129 (XFree86-VidModeExtension)
  Minor opcode of failed request: 10 (XF86VidModeSwitchToMode)
  Value in failed request: 0x4200003
  Serial number of failed request: 213
  Current serial number in output stream: 215
cabz@cabz-Presario-M2000-PX392UA-ABA:~$

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.