If DIVs didn't work right in Netscape 6, you aren't programming to the standard.

If they didn't work in NS 4.x, then you didn't program to the NS standard

Basically no browser complies to the standards completely. NS 6 (Mozilla) is the closest any one has come. IE has had it's own quirks with DHTML code (As seen by my old javascript statements on a few DHTML pages to detect and activate workarounds).