I use the gradient overlay effect quite effectively, but often it stops working after three or more edits in the gradient colors. I can continue to bring up the effect dialogue window but clicking on the Gradient color box no longer brings up the dialogue box that lets one edit the two or more gradient colors, etc. I must quit AD and bring it up again. It then works for a few edits (sometimes up to 7 edits but often 2 or 3) but then I no longer get any response by clicking the Gradient color box. I remain on the correct layer while doing this, the gradient effect is chosen. The main Gradient Overlay effect dialogue window always appears but I cannot go further into editing colors or other gradient settings. Is this a bug or is it soaking up too much memory?