[troyb]

Great news! To those trying this out, make sure you enable the Adobe Viewer in the plug-ins preference pane if you've previously disabled it.

You also may need to turn off built-in PDF support if you enabled it with this terminal command:

defaults write com.omnigroup.OmniWeb5 WebKitOmitPDFSupport -bool TRUE

and set aside other PDF viewer plug-ins if you have any installed.