Resource types

Our site has upgraded from 1.7 to 1.8. In version 1.7 you could select a pdf file to display in a new window and it would display as expected in a new window with a single scroll bar. Now the pdf file shows up in a new window but the pdf document shows up as a window (or frame?) with its own scroll bar inside the browser window which also has a scroll bar. This is an annoying arrangement manipulating two scroll bars. At the bottom of the window is a link to "Direct Link to this File" Clicking this makes the pdf document fill the browser window and use the browser's scroll bar. The "direct link" is what I'd like to be the default display. Can this be done?

The URL for the window in window view is; http://moodle.wilson.edu/mod/resource/view.php?inpopup=true&id=4504

The URL for the desired "direct link" view is;
http://moodle.wilson.edu/file.php/261/Syllabus.pdf

I've tried entering the "direct link" URL when setting up the resource but Moodle treats it equivalently to just giving the file name. What is curious is if I go to the "Files" section and click on the pdf file directly then it shows up as desired filling the browser window with only one scroll bar.

Thanks, Perry Wood