the chmod option should be applied to all folders and files created by the fm, otherwiese you have the problem the manually remove folders which are created by the fm, when having permission restrictions and no fm anymore (spercially the thumbnails folder is then imporssible to remove, beacuse the fm will create always a new one when you open it :-)
mkdir() was invoked in several places with recurse=true at the position of the chmod rights parameter. Ouch. Fixed in the MoA commit @fc847537a042b0d39870ffa3b215759dde754efb
the chmod option should be applied to all folders and files created by the fm, otherwiese you have the problem the manually remove folders which are created by the fm, when having permission restrictions and no fm anymore (spercially the thumbnails folder is then imporssible to remove, beacuse the fm will create always a new one when you open it :-)