Also: entering "unity &" from a command line to restart Unity restores the lost icons. Possibly interesting info: when the top panel is rebuilding, the two missing icons appear first all the way to the right and then the rest of the icons and clock, etc. are added.
Also: entering "unity &" from a command line to restart Unity restores the lost icons. Possibly interesting info: when the top panel is rebuilding, the two missing icons appear first all the way to the right and then the rest of the icons and clock, etc. are added.