Screen flickering (black / white triangles) on vmware mac sierra when firefox is open

[amitbet]

While viewing with vnc & running different programs (chrome, safari, finder ,etc) all is ok, when firefox is opened trianges starting from the upper right corner start to appear, slashing the screen with white or black colors, then the actual screen gets repainted, this type of flickering appears each time a refresh occures
vnc server versions tested: 5.01 & 5.2.1
Clients tested: tightvnc, vncproxy recorder, tiger
This happens only with firefox, i disabled hw acceleration which didn't help.
tried it on my mac - everything ok (no bad triangles) - it might be due to some issue tied to the virtual hardware while running under vmware.
tested different encodings: zrle / rre / raw / tight - all have the same gliches
mac remote desktop (screen sharing) does not contain this bug, everythitng looks ok in firefox as well.
I recorded a session to fbs file, the playback has captured the issue, and replays with glich included.

this might be due to the image capture method, is there any way to configure the server to use polling instead of some mirror driver?

thanks,
Amit.

[stweil]

Maybe using a different screen capture like the one which is proposed in issue #25 would help then.