It may have been discussed in that thread, but nothing has been solved. I am currently using a a manual trackback page, and this isn't going to last long, before I go back to 1.5.2. Although I am going to have to figure out how without loosing anything from the database.
I cannot recommend any of the blogs I administer upgrade. You would think with all the bug checking done with 2.0 someone would have tested this feature before its release.
Besides some minor benefit of the WYSIWYG editor I don't see any real improvements. Actually since I have customized the old editor, I still have to do a bit of work on the new editor to even make it as functional.
They say it posts faster, but it doesn't. They say it loads faster, but it doesn't. Now trackbacks don't work either.
I appreciate wordpress, but I think they dropped the ball on this one.