It appears that some have recently been fixed (including the problem Vladimir was refering to).
On Sun, May 30, 2010 at 1:25 PM, Bastian BeischerWhat about the current Emacs development trunk branch, are the bug
> I also had this problem. It seems to be a bug in the CEDET version which
> comes with Emacs 23.2.
> I solved this by installing CEDET from CVS.
> There are still quite a few bugs in the Emacs 23.2 CEDET and it seems that
> all of the ones I found are gone with the CVS version.
fixes merged in there yet?