After a connection received an error it got stuck on stupid. I could not reconnect to that server even after the error condition was remedied. I had to quit Viewer and relaunch. Then it worked fine.
Client: iBook G4, 1ghz, OSX 4.10
Server: Powermac G4 sawtooth, 800mhz, OSX 4.10
Server: OSXvnc 1.71
I believe the error was caused when the G4 (server) dropped its wifi. But I don’t recall the error string. I will forward it if/when it happens again.