"...This site is specifically designed for viewing with Microsoft Internet Explorer.?
If you are using a browser other than Internet Explorer? you will not be allowed to proceed further and will be redirected to the IE download site..."
uhu-uh, Im not allowed to browse it with my fav. browser mozilla?
.. and how about following some wc3.org standards when it comes to <a href="http://validator.w3.org/check?uri=http%3A%2F%2Fwww.opticalamplitude.com%2F thm-tropic%2FmainV5b.html&charset=%28detect+automatica lly%29&doctype=Inline">html</a> and <a href="http://jigsaw.w3.org/css-validator/validator?uri=http%3A%2F%2Fwww.opticalamplitude.co m%2Fcss%2Ftropic.css&warning=1&profile=css2">css</a> ;)?
Im no big fan of frames either, not to mention they suck with SEs and when you wanna bookmark a particular subsection.
Nice GFX/design, especially the tropical theme.