stack fault in module NVOPENGL.DLL ?????

When i Alt-tab (minimise to desktop) out of a game of kingpin i get this…

KINGPIN caused a stack fault in module NVOPENGL.DLL at 015f:6950f933.
EAX=0203fe94 CS=015f EIP=6950f933 EFLGS=00010216
EBX=0203fc00 SS=0167 ESP=015a1ffc EBP=00000000
ECX=00000000 DS=0167 ESI=0203fc0c FS=0f57
EDX=80556a98 ES=0167 EDI=0203fb64 GS=0000
Bytes at CS:EIP:
53 56 8b 74 24 10 57 55 83 7e 0c 00 0f 84 37 01
Stack dump:
00000000 6956cd27 0203fb64 00000000 0203fc0c 014e6568 0203fc00 69582cca 0203fc0c 014e6568 0155db80 0203fc0c 00000010 69612809 014e6568 014e6568