I've added hostextinfo.cfg as follows:
icon_image_alt Windows Server
And I see the windows graphic on the host pages, but not on the status map. Even when I hover over the node on the status map the pop-up displays the graphic, but the node itself has just the blank square. The server's GD version is 2.0.34 and file permissions seem correct since the png's show fine.
Do you have any troubleshooting ideas?