wandyfromnew york,
I am not sure why you mention Safari when everyone is talking about iTunes.
When I download a PDF I want safari to open that. That has no relation to iTunes.
When you download a movie or an mp3 and safari opens that "safely", it opens iTunes. Becuase your default player is probably iTunes.
Everyone,
I have a MAC so I will only explain what is going on on a MAC OS.
When you import a file into iTunes (from the file menu) it won't play the movie/audio. The same happens when you drag and drop your files into iTunes window, which essentially means import).
When you drag your files to the iTunes icon (in the dock), you are telling iTunes to play the files! Basically you are draging the files to the iTunes Application, which will open iTunes and PLAY your files.
So in iTunes, the "import" function is when you drag files into the iTunes Library, or you click on file>Add to Library..., otherwise dragging the files to the iTunes App is telling iTunes "play" these files or this file and NOT import.
Hope this was clear.
Another example, when you drag a file to your VLC application (in the dock) that file will PLAY in VLC. When you drag it into the playlist it will add/import the file to the playlist.
Cheers!