I've tried to figure this out several different ways, and it may NOT be a problem with WordPress seeing as several things were updated at the same time, but it's no longer working.
The site in question was working perfectly on WordPress 3.1 and Headway 2.0.8. The updates came out at pretty much the same time, so I ran them both. Now GeoPress isn't working any longer.
I rolled Headway back from 2.0.9 to 2.0.8 where it was working before, but that didn't resolve it.
Any ideas what this could be? Have you, or anyone else run across a similar issue?