hello mf4231,

sometimes rebooting the computer will reset the settings.

Thank you! I disable acceleration and restarted it, and it worked.

thanks for letting us know.

i would have thought that "hardware accelaration" would have been fine tuned and tweaked by now.

-)

This is the second time it happens, I couldn't remember how I switched it back the first time, but it had to do with about: config. It lasted a couple of months until this morning. It's extremely annoying!