all desktop icons flash rapidly when "disable all" is selected in the "windows 8 settings" section and mouse is moved to the top of the screen (only the top). open windows and taskbar are not affected. releasing the hot corners/start or closing classic shell stops the blinking.
there used to be a ticket about this, but the poster found it only happened in virtualbox, and got closed.
. core i7-3770 (4 cores), hyperthreading enabled, 16gb ram
. windows 8 x64 (standard), all updates installed to date.
. classicshell v3.6.5
. graphics: MSI N640GT (nvidia geforce 640gt) 3gb, nvidia drivers, v310.90
if you'd like a video, i have the latest fraps installed