Comment 44 for bug 112684

Just checked, and find that the /tmp directory is 755 permissions as I mentioned, but the enclosed files are 600 permissions, so on my Ubuntu 10.04 box another user cannot actually read my F-spot created files.

This is better than the default 755/644 permissions on directories/files normally used!

So for Ubuntu users I don't see the persistent-until-reboot temp files as a security or privacy issue of any special note.