[GRASS5] g.region segmentation fault?

For some reason, I'm getting a segmentation fault when I try to run g.region. Does anyone know why this may be and how I might fix it? It was working just fine until just a few minutes ago. When I traced my error down, I realized it was g.region that was failing. But a segmentation fault? That tells me something got corrupted or something weird happened that was out of my control.

David