I wasn't sure whether to post this in the Adobe Reader forum or the Mozilla Firefox forum, but decided to post here.
I am running the latest versions of Adobe Reader X and Firefox on Windows Vista.
Open Firefox. Open a new tab. Then open an Adobe Acrobat document within the new tab. Now it won't let you highlight text in the urlbar with the mouse for copy/paste. You have to click the "Go back" arrow, or go into another site, and then return to the adobe document in order to copy/paste. I tried the same thing with Internet Explorer and Chrome, and the glitch didn't seem to happen in those. It seems to be only an issue with Firefox.
Sounds like a Firefox glitch. But hard to tell. What version of Firefox?
I am using the latest version, 3.6.15.
Admittedly it's a minor glitch. I discovered it when I was trying to copy the url for some show's TV listings that were in pdf format in order to help someone on another forum, and I couldn't get it to highlight the text.