I was looking at my MySite and was attempting to put a custom web
part onto it, it was either a "My Documents" or "My Task List" web
part, and I got an error returned, saying "No Such Field Name." Now
every time I try browsing to that page or the home page for the
portal (I tried there too, to see if the same thing would happen
there), I get that error.

I've tried looking for solutions on the internet, but the error just
seems too ambiguous. Does anyone have any idea what might be
happening? If I had code, I'd show you, but I didn't write the web
parts.