This issue is a touch late partly due to the Memorial Day holiday in the U.S., and partly due to us helping Chad and Galen Magendanz ShrinkWrap their apartment and mount the resulting disk image in their new house. Apologies for any confusion our tardiness might have caused. [ACE]
Using Expose within Spaces
To drag a file into an application that's running in another one of your Spaces, use Expose while in Spaces overview mode. First, press F8 to go into Spaces overview mode, then press F9 to Expose all application windows. Hover over the application window you want and wait a moment or press the Space bar, and both that space and that application come to the foreground, ready for you to drop the file.
Visit plucky tree