Ok; I'm out of ideas at the moment, and I'm not excluding a hardware fault on your computer, but if you can figure out more information about how or when it appears, or what causes it to appear, that is likely to be helpful in tracing this bug down.
Ok; I'm out of ideas at the moment, and I'm not excluding a hardware fault on your computer, but if you can figure out more information about how or when it appears, or what causes it to appear, that is likely to be helpful in tracing this bug down.