Regularly I do not use many Qt applications, mostly Skype. I run it over
ssh tunnel from another computer within the same local network for long
time. After recent system update I noticed it became very slow refreshing
its graphics. I checked several Gtk and Qt applications and found that
Gtk ones work almost with the "native" speed, while Qt ones with that
damn slow redrawing...
I tried ssh with both "ForwardX11" and "ForwardX11Trusted" - there is no
difference. I'm using no DE with xmonad WM (tried TWM - no difference
either) in x86_64 box.