Could someone else confirm if they are having this issue as I am beginning to wonder if this is a design issue.

I have had problems with my Latitude E6520 which is paired with a Dell Bluetooth Black Travel Mouse - the lag on it at times is absolutely criminal - it can be 1 whole second behind, by which time you end up clicking the wrong item/link, etc.  It is driving me nuts!

Dell haven't been able to discover any issues, so sent an engineer to replace the Dell 375 Bluetooth Card.  The replacement card did not work at all so another engineer was sent to replace both the motherboard and bluetooth car.  This didn't work either, and it was left to me to work out that the bluetooth software needed to be completely uninstalled then reinstalled for the new bluetooth card to work.  I am now experiencing the same issue with the new mobo and bluetooth card, so the issue persists.

Perhaps it is a software issue?  This is why I would like to know if anyone else has experienced lag with their mouse on the E6520.

Thanks for any replies.