Comment 20 for bug 1190535

Same here under Ubuntu 16.04 and Gnome 3.20.4
Stuck the whole interface for one minute when I've tried to move an icon on the favbar. Freezed again for 30s or 1mn when I've started an application just after this. Freeze ended by a Gnome dirty restart with all workspaces windows on the same screen, I did Alt+F2 and "r" to restart properly. Now everything seems ok but it's a weird bug. Hard for noobs like me to understand the cause at first sight.