Hi Drew G
I've seen this before. Unfortunately, I cannot tell you how
to overcome it. In my situation, we had Microsoft FrontPage webs.
When I would see it, I reported the issue to the folks that managed
the web servers. They did something to correct the issue. I'm not
sure if it involved a server reset or maybe simply restarting a
process on the server. But they would do their thing and I'd be
back in business.
Hopefully this helps... Rick