Question: Every now and then I get the "zlibinstream:exceeded bytesIn" error when trying to connect to my server through my vnc. Why do I get this error and how can I solve it when I get it - without restarting my server ?

Answer: 
In my case the solutions is just to change quality to `Low`. Seems to work fine.
Opening the options dialog without changing anything did it for me. **Baffled**.