Slow down or lag on PandaES

Hi everyone just a quick question has anyone else seen a slow down or lag with the screen handling ie you ckick on the window to move then it is slow to respond??
using 5.21 20 oct 13.
looked in tasks cannot see any rogue program eating cycles??
It’s like it’s doing something in the background when you are typing it will miss letters.

Here is a bit more info running at 16m colours 1680 × 1050 screen res this uses 6892k screen memory
es clocked at 1200 MHz using the latest boot with pandaland SP3
It a strange one

On my Panda (non-ES) no issues like that with 5.21. I run it in 1920×1080@16M so that is not an issue.
sounds like a USB thing.

I think you may have hit the nail on the head i moved the mouse into another port and it has gone for now