i put my complete oz env here :
http://supervision2.filnet.fr/froggy...j/openzone.zip
if can help
bug is not all time , here have 1/2 time
for information i have a crash near 1 month i had reinstall totaly my windows and change my video card , but i already had this bug before crash
and i just make a virus scan in my oz directory but it s clean ( in the case of a virus modidy the exe)