Thanks for the responses guys. I was pretty doubtful that there would be anything malicious on TrailManorOwners domain.
Bill,
You were close, but I'm not Navy.
I'm just a bit south and west of the Naval Center in Indianapolis. I am a network systems admin at Joint Forces Headquarters for the Indiana Army & Air National Guard. Turns out I was still using our alternate proxy after downloading some large driver packages (as not to bog down the main proxy). I guess our reserve proxy is using some lousy filtering software, and I'll be sure to snub my nose at our IA and NOC folks next time I'm in their building!
The site works just fine on our main proxy, which routes to a National Guard Bureau regional hub in Iowa.