Hmm. I guess the answer is "maybe." I wonder what was the file format? If you have it set to a photoshop PDF then possibly or if you have your compatibility set to a legacy version then maybe... That was normal in older versions of ps where text was uneditable. Check your preferences thoroughly and try trashing prefs, too. Beyond that I'd have to see your setup. That's a head scratcher.
Jonathan Ziegler
http://www.electrictiger.com/
520-360-8293