This is an old thread, we are on E24 now, I wonder if we should merge some threads, rename them, or even delete them ? 
Anyways, I wanted to report my recent experience, on which I found E24 to be extremely laggy, more exactly, the desktop is not responsive, it takes around 1 entire second to display what I'm doing (if i type with the keyboard, it takes 1 second to appear, if something is drawn on the screen, it takes 1 second to show up, etc..)
I'm the only one to have this issue ?
