Unexpected Error In WIN
 

Help! I have just upgraded from 1.4, and I'm not sure if I should have. When I startup LW 1.6d everything clicks over to a point, and then stops - no GUI! The error log generates this message:

"An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x6d205635
Function name=(N/A)
Library=(N/A)"

Anyone know what this problem is??