I am coming to the pros for help again.
While working on my late 2008 MacBook Pro running 10.8.4. Every so often while on the internet the page will suddenly magnify. At first I thought I was dragging my finger or thumb and in combination with my finger was doing the "expand motion" inadvertantly zooming. Then I thought if I can zoom in I ought to be able to zoom out by reversing the action. No dice. Doesn't work that way. I either have to use the back key, reload the page or I have to use "shift-command-minus" to reduce it. I went to the System Prefs and opened Accessability. It just happened again as I was typing this and I had a hard time getting back to it. In Accessability, I unchecked anything that had to do with zooming. It made no difference. This zooming has made it hard to use the text cursor.
Any suggestions?