Feeling: frustrated again

In June, I was feeling frustrated because I couldn’t figure out how to get Vim working correctly on my machine.

In July, a reader sent me a file that made it work.

Now it seems that I have a new problem with Vim. Whenever I try to open a file with it, I get an empty buffer. I think I found a clue about what’s going on. When I try to save this empty buffer, I get this:

E203: Autocommands deleted or unloaded buffer to be written

I have no idea what to do about this, though. Anyone have ideas?