I've fixed the problem doing this:
1. Ctrl-click the iTunes eXpanded.adiumScripts icon (~/Library/Application Support/Adium 2.0/Scripts/) and select "Show contents of package".
2. Open Contents/Info.plist in any text editor.
3. Search "/nowplay" and change it for "%_nowplay".
4. Save the file and launch adium.
If you decide to do this (at your own risk), please do it carefully.
# by danielrt on 10/15/05 at 15:38:44
1. Ctrl-click the iTunes eXpanded.adiumScripts icon (~/Library/Application Support/Adium 2.0/Scripts/) and select "Show contents of package".
2. Open Contents/Info.plist in any text editor.
3. Search "/nowplay" and change it for "%_nowplay".
4. Save the file and launch adium.
If you decide to do this (at your own risk), please do it carefully.