I have tightvnc
http://www.tightvnc.com/ (the latest one) and putty (the latest one).
Do You suggest there are better servers? Like what?
I am not sure whether this is a vnc server issue, maybe this is the way kindle works, or hardware driver of the eink display works...
Generally, apart from vnc- I was wondering if those updates make kindle dxg eink refresh rate smaller (faster response time).