Open dconf-editor and go to org, gnome, control-center and last-panel. Set the value to default. This worked for me. Thanks to bpurgar for the solution in FreeBSD Bugs. See more at Bug 259007.
Published by Micski
Micski lives in Copenhagen, which is the capitol city of Denmark, where he's a system administrator of information technology and a semi-professional poker player. View all posts by Micski