(TechNote) When you open certain large files in Design view in Dreamweaver 8 on the Macintosh, Dreamweaver does not render the complete page. This typically causes the last section of the page to be cut off. This issue does not occur in earlier versions of Dreamweaver.
The size limit is not the number of bytes in the source file, but the display size to which the markup renders. Dreamweaver 8 currently has a limitation of 32,768 pixels by 32,768 pixels on the Macintosh.