I've recently installed AR9, but sometimes (because of unknown reasons and in accidental manner) I see mess (lines, spots etc.) in docs that have been stored on my computer many moons ago, and which I have read many times without any issues. see below how it looks like. Moreover, if I press mouse button or move over menu items or scroll mouse button, the volume of mess increases and a page moves to the left top corner.
Thanks in advance for any help.
What version of Reader 9? What OS do you have? Off the top of my head, I would suggest you see if you can turn off any video acceleration features on your monitor's video driver.
version 9.1.2 (with latest update). OS WindowsXP SP3. Yes, I have ATI MOBILITY RADEON X600 and full acceleration was switched on. I tried to switch it off (as well as 'write combining' option - I wish I know what the hell does it mean), and could not reproduce such effect that I have benn astonished before. Probably, it is a cure, in some sense. Thank you.