Im on my imac: http://screencloud.net/v/uKZU Recently updated my memory and its been working good after that. But now suddenly i experience delay/lagging when i write. Not all the time, but still pretty often. I type something, and then it takes 3-4 seconds before it appears on screen. Same goes with using backspace, and scrolling with the track pad also generate delay (recently switched battery on trackpad also). Ive tried rebooting the system, and im not using any more heavy software or something compared to before this started. Anyone knows what its about? Thanks in advanced.