shows a screen shot. Sorry site's behind firewall so no code but I've turned off borders everywhere and dictated page borders and margins of 0.
IE's 2nd frame (top thin red line) starts 2 px lower than Netscape's.
A bigger problem is tables. - probably cuz of differences in how text/fonts are rendered. Notice how far wider Netscape is.
Are differences of frames and tables -at the pixel level - documented anywhere?