XP, AR X. when I open a .pdf I get one two types of screen presentations. First is the old time conventional
windows format, white background, file-edit---- help, etc. More recently I will sometimes get a screen that
has a black background. Has page, zoom and print options but no help; i.e., no About either. More often than
not I also get a tag line across the top that says "this document might not be displayed correctly" on the left and
"open with different viewer" on the right. I don't understand what is going on. Can anyone clarify. Thanks.