Number of gallery photos 10???

Hello, it is not possible to allow more than 10 photos in

Admin -> Settings -> Advanced Settings -> Number of gallery photos which can be uploaded by user

What could be the reason for the limitation. How can I permit more than 10 photos? Its not possible to change the limit (!)

Thank you very much in advance

You can put more then 10. Just change the number in the box.

Don't forget to  click the save button at the bottom.