Eclipse "invalid resource directory name"
Folders in the res-Folder are only allowed to be those defined by Android, for example "drawable". See http://developer.android.com/guide/topics/resources/available-resources.html for more information. If you choose anything else you get the error "invalid resource directory name" when building your project.
Just learned something!
FYI I 'm trying to store some audio files, created the folder audio under \res and got the same error. Then after some reading somebody wrote somewhere that \assets folder is a good folder for data files that don't change. So I placed my audio under \assets.