I'm on a Mac as well and have similar results to Kaal-Jhyy with Netscape. The odd thing about Netscape, is that the links pop out into a new window. Netscape cuts the link images in half, might want to increase the frame sizes. (things vary between mac and pc and browsers)

Looking through the coding, some of the <frameset> values you have in quotes and others you don't.

I find it sometimes helps to indent subset commands.
for instance:
<frameset rows="A,B">
_____<frame src A> (OT.com deleted the tab spacing, so i've replaced them with underscores)
_____<frame src B>
</frameset>

none