gtkmm-ERROR **: file treeiter.cc: line 214 (const Gtk::TreeNodeChildren& Gtk::TreeRow::children() const): assertion failed: (!is_end_)
aborting...
/usr/bin/su-to-root: line 100:  5393 Aborted                 $COMMAND

Tried to make an FAT32, 31gb partition to an USB drive (well, it *IS* there but I don't know if it's properly made now :/)

GPARTED crashed with that message

knoppix 5.1