Orphaned User Visgroup?

I'm having this problem too. Apparently it's extremely rare because your post is the only thing coming up in Google.

My problem is that I went through and deleted all of my visgroups so I could re-organize them. Some things disappeared and I couldn't get to them. And my new Skybox visgroup had a gray check mark when I turned it on as if something was hidden though the whole thing was there.

Today when I re-started, it formed the orphan hidden visgroup and stuck the things I couldn't get to yesterday into that and my skybox visgroup is working properly.

I think Hammer was just acting buggy. Hopefully the file isn't corrupted.

No, I didn't use DispGen. I can't remember exactly what I did, but I think what caused it for me was erasing my visgroups wholesale. Some stuff that was in a visgroup didn't become unhidden when their visgroup was erased. I knew I didn't delete it, so it all just disappeared.

It was stuff I was going to throw away anyway so I really wasn't paying attention to it much. So when it came back in the orphan visgroup I deleted the stuff and the visgroup. But then I thought, "Well, that's weird. What if it's part of a bigger problem?" So I googled for it. Hammer hasn't done anything weird again yet, so I have my fingers crossed.

I think my problem is generally solved, but I figured I'd reply in case anyone else was looking for info on this. Also, in case someone knew it was a major problem that I shouldn't ignore.