Raspberry Pi OS 11, Bullseye

[DaveFromCampbelltown]

Ok, I have just updated my RPi 4 to the latest (Nov 2021) Raspberry Pi OS 11, called Bullseye.
Generally it works ok, but I have run into a couple of problems --

1. I can't get Megasync working, as there is not a version available yet. This is not a vital problem yet, as I was only using it as a backup if the Internet went down. However, it does limit what I can do on the RPi.
2. If I load Plank docking app, I get a large black bar along the bottom of the screen. I think this is something to do with Mutter. I can't get Cairo-dock working, due to an incompatibility with one particular library.

I expect these will be solved over time, with updates, but it is a pain for the moment.