I've done a site which I've put up for testing at:
www.biggingerfish.co.uk/sigtest/
It looks fine on my mac in all browsers, but I've asked some friends to look at it and a couple of them say that the middle frame goes up and obliterates the top, navigation, frame. The code on the frameset is:
frameset rows="144,530,60" frameborder="NO" border="0" framespacing="0"
frame src="top.html" name="topFrame" frameborder="no" scrolling="NO" noresize
frame src="home.html" name="mainFrame"
frame src="bottom.html" name="bottomFrame" scrolling="NO" noresize
/frameset
Any ideas how to stop this?
(I've removed the<> from the code as it didn't show up)

Sorted it. *