I've downloaded the update to Reader X. The quality of the screen reproduction of documents is terrible - mainly due to jagged edges in non-vertical and non-horizontal lines in text characters. Increasing the zoom makes it worse - the text becomes even more tiresome to the eyes...
What have you done!? Can I have Reader 9 quality back please! It was great :-)
[system is Windows 7 on a high res. LCD screen]
Try different settings in the preferences of Adobe Reader X.
Excellent advice - all is well now.