jt123454

When using winmugen my screen flashes white every once in a while. After using mugen for a while the flashing increases in speed untill mugen is unplayable. Rebooting my system fixes this temporarily, but the problem returns. Anybody seen this or have any ideas what I should check? My mugen.cfg is set to 640x480 DXMode Hardware strecth=1 and doubleres =4