Please feel free to add to this thread!
Call to undefined function language_dropdown() in /wp-inst/wp-admin/options-general.php on line 27
Solution: Comment out the php in line 27
Category AJAX thing when posting new entry doesn't work- displays small ugly box over category names
Solution:?
options-general.php has since been updated to version 574 and lines 25-32 have been left out.
Here's one I just found on the wp-admin/wpmu-blogs.php page.
Fatal error: Call to undefined function AJAX_search_box() in /var/www/virtual/blogtown.co.nz/htdocs/wp-inst/wp-admin/wpmu-blogs.php on line 224
Looks like the AJAX_seach_box function was removed in changeset 567.
(Ticket #32 raised in Trac.)
Ticket #32 has just been fixed with revision 580!
http://trac.mu.wordpress.org/changeset/580
Thanks for openinig the ticket and reporting it here. I'm slowly working through the bugs!