Yes, it with the computers connected to through hub. The F5D7330 is connected to - bridges to - an access point (D-Link DWL-G700AP) which in turn is connected to a router. This router doles out the ip-addresses on the LAN.
The reason here was the D-Link. I haven't figured out what the reason is.
Opera? iCab?
I've used the F5D7330 as a WiFi adapter connected to the ethernet port on a Power Macintosh G3 (Gossamer) running Mac OS 9.1 without any problems. I was able configure the adapter using IE 5.1. So your Dad should be allright there.