Ok, last update to the script for a while. I've tested it with sample point-printable and zone forecasts from each NWS region (WRH, CRH, ERH, SRH, ARH, HRH) and all work fine. If there are alerts in your region (red text below the icons and above the detailed forecast), then the output will fail XHTML 1.0-Strict validation due to a deliberate inclusion of a target="_blank" in the <a> link .. it validates (like the basic template set with XHTML 1.0-Transitional however.
Latest version: advforecast2.php V3.05 - 05-Jul-2012
V3 template users: use the update tool page
for Base-USA (05-Jul-2012)
Standalone/V2 templates: use the scripts page