I had to rebuild my webserver.  It's all on new hardware (well, an old Compaq Celeron).  During the transition I lost most of my images on the blog posts.  I thought they were being backed up, but they weren't.  Oh well... now that this machine seems more stable, things should stay up a little more consistently.  I thought it was Ubuntu causing me problems, but turns out my other old machine was flakey.