Yes, you’re right. My question was: what do the (default) values ‘777’ & ‘666’ under “Permissions” (in Advanced Options for Foliopress) refer to ? I.e. under which circumstances are they used and in what functions ?
As I described, I manually create & set the ownership for the directory used for uploads with Foliopress (in my case, it is the same as for wordpress: /wp-content/upload).
These settings allow the webserver (in my case, the ‘apache’ user) to create directories and write files below the upload-directory. The permissions chosen (775/664) are as safe as possible.
But “777” (for dirs) and “666” (for files) as they appear to me to be the defaults in “Permissions”, allowing the ‘world’ to do anything sound quite unsafe to me.