Um, it's been a while, but isn't renormalization of the electron in QED
still a problem? There's an infinity that doesn't go away. This is
likely a problem in the mathematical description, but I think that
black holes are really tears in the "fabric of space-time".

When it comes to the original question fo the missing black hole in the
open cluster, I wonder if the problem here isn't simply and
overesitmate of the mass. We don't need to invoke dark energy to solve
this. (I'll admit that it is an interesting possibility.) I know that
there are those who believe that dwarf sphereoidals aren't all that
massive.

JD

"Everything should be made as simple as possible, but not simpler." -
Albert Einstein