For those running D²OL and Windows XP:
Turn off Error Reporting, if gridwin.exe encounters a fault and Error Reporting is turned on D²OL comes to a standstill ( usually on your fastest PC right after you've gone to bed and you lose a whole nights crunching :| ). However if Error Reporting is off then everything carries on as normal.
PS , could this thread be renamed to D2OL FAQ or something so it's easier to find ?