Clicking on the 'Restore' then 'Maximise' icons in the top right corner of the window, in rapid sequence, seems to restore task bar functionality. It's a work-around, although it's not a fix.
I periodically export a folder of "work" bookmarks from home to workplace. Because I can only export everything (private and work), I then have the inconvenient task of picking through the private bookmarks and deleting them, using up my valuable wor...