Im having issues with Text falling off my page

http://www.directsound.com/about.htm

It has happend to a few of my pages as the WYSIWY view shows it well within the page but after I go and publish I find it to be off the page and Im not sure whats going on this happens all on the same computer and others as I am at work and went to look at my changes I made last night and sure enough the text fell off the page

Mike