Framed sites inhibit Bookmarking. Just try to bookmark a specific page on a framed site, then see what you get when you come back. Users typically can only print part of a page. Frames sites are short-changed by the major search engines. This creates extra non-value added work for the Web development staff.
Frames can take up too much screen space.
Frame Haters are a vocal majority. Yahoo even has a special section for Frame Haters . Use frames sparingly. A framed page will load as slowly as a frameless page. Frames work better on Intranets rather than Internet pages because the user is typically more familiar with the content, bandwidth is higher so loading is quicker, and intranet users tend to print pages less.