I have a SharePoint 2010 RTM install that is working great except for a PDF issue. When clicking on a pdf document in a library I am asked if I want to open it as read only or check out and edit. If I choose read only I am them shown a dialog box with just save and cancel buttons.
In SharePoint 2007 clicking on a PDF document would just open the document in the Adobe Reader.
How do I restore the functionality so users can easily view a PDF without having to download the files?