Suppose you're non-root user and you want to format e.g. an SD card for use in your phone, using ext4. Performing this operation in KDE Partition Manager results in the disk having root access when mounted. Performing the same operation in gnome's utility "Disks" gives the right permissions. (Incidentally one can open Disks and perform operations without needing elevated root privileges.)
Steps to Reproduce:
1. Format disk in KDE Partition Manager
2. (Auto)mount it and try to access it from non-root user
Can't access it from non-root user
Can access it
Partition manager itself runs as root user at the moment, that's why only root can access partitions formatted by partition manager (similarly for gparted).
It would be nice to have partition manager use policykit but unfortunately that might take a long time to implement.
*** This bug has been marked as a duplicate of bug 259678 ***
Closing this as duplicate even though the other bug is much newer (but it has more accurate comments, i.e. it's not because of GUI running as root).
*** This bug has been marked as a duplicate of bug 407192 ***