When trying to load this site, I often get a message about being unable to find it (I use Firefox). Sometimes a retry will load it, and sometimes not. Any ideas or tips on what the issue is?

If a reload fixes it, it points to a DNS issue typically.  I've started seeing more of these recently with various site, I'm not sure why.  The uptime on this site is pretty good, so I kind of doubt it is a server issue.

I have had the same problem sometimes, not often.  I also use Firefox.

Bill