emacs 23.1 not responding, known bug?

[Dave Milter]

After update to 23.1,
I time to time see the same behaviour, emacs not responding to key presses,
and eats CPU like a pig,
ctrl+g  only helps to return responding by a second, then it again eats CPU.
if connect gdb to emacs it show that it hangs in mark_object function.

Several people told me that they see the same behaviour, but they advise me
just stop use 23 branch and return back to 22. May be there is another solution?