[development] critical project module issues: duplicate calls to menu items, and $_POST variables unset

[Nedjo Rogers]

Updating drupal.org to CVS HEAD is being held up in part by two critical 
bugs in the project module:

http://drupal.org/node/50337 version select broken when browsing projects
http://drupal.org/node/50786 comment issues broken

Both of these bugs cropped up recently after things were working fine, and 
they seem to reflect the same underlying problem.

The menu item functions implementing these functionalities 
(project_page_overview() and project_comment_page(), respectively) are 
called twice in the course of the page handling, when presumably they should 
be called only once.  The first time they're called they have access to 
$_POST variables, but the second time they don't, and so, seemingly, fail 
for lack of data.

Is anyone aware of a recent change to core that might be producing these 
double calls?  Or changes in the handling of $_POST variables so that they 
are unset?

Any ideas would be very welcome!