BTW, Adobe's pdf reader has not been called Adobe Acrobat Reader since version 5. Since then (version 6 and later), it's just Adobe Reader.
Your absolutely correct. I've updated this and have also spent the night updating the script to support Adobe Reader detection (at least for 7.0 and above). In addition I've also added a new link to indicate if PDF support is available for users who have alternative readers. Finally, I added a new section for users not running Chrome (since it seems my CSS trick doesn't work in Chrome) that will show sites that have been visited and did a few dozen other updates to the script.