Macromedia Dreamweaver 8 problems

I use Macromedia DreamWeaver 8 on Mac OS X to edit this site. Full featured, but rife with bugs, and lately it has been acting up with a blank display as shown below, making it impossible to edit the page except as source code. If you know what might be going on, please email me. The markup validates, and web browsers are perfectly happy with the pages. My Digital Infrared article is one page that is having severe problems; scroll down about 3/4 of the way in DreamWeaver 8 and it starts drawing a blank or partial page.