Has anyone else had a problem where buttons on the screen seem to lock up? For instance, on a form in Safari, it takes 5 or 10 clicks to get a checkbox to respond. (Actually it happened on this page... the Submit button isn't clicking). I am wondering if it's a software conflict or something. I am running OS 10.3.5 on a Dual 2.0 G5. I know this is a strange problem and understand if nobody has an answer. Thanks.