Insert as Gallery without uploaded Image

hi, my users are able to "Insert image as Gallery" without any uploaded Images!? i see on a blog entry gallery code in blog entrys without images..

i'm missing here a message like -> Please upload first images before you try to insert Images as Gallery!

MyMedia + MyAlbums

Step to reproduce:

1. Login in your Demo (nadia)
2. click on Media Manager Button
3. Message "There are no contents in this folder." should be showed
5. click on Insert as Gallery Button
6. Code

[embed=gallery]{"file":"/","place":"user:609"}[/embed]

is added in write blog Editor