@Derelict:
Draw your network. It'll probably be obvious if you do that.
Thats the problem… Both networks are very simple... Flat networks, only one switch, both have identically configured pfSense routers.
My hard-wired machine has the ip: 10.1.2.100. My laptop (wireless) has the IP 10.1.2.101. Desktop can access the NAS, laptop can't. If I attach the laptop to the switch, and even use the same IP it works.
This is why I think it's my Wireless AP, but there's nothing special there either. It's a Rucks Wireless 7363, nothing strangely configured. I have another AP here that I can swap out and test.