Here is the situation regarding the 2.44 update problem as far as I know.
The update system is permanently bugged. Microsoft are not going to fix it. What they are doing is manually pushing each update through the distribution system as it is approved by peer review.
Each dev is supposed to inform the xblig support person at Microsoft that they have a game in review and schedule a release date so that the appropriate tech people at MS can be scheduled to perform the manual push. Unfortunately I wasn't aware of this, and I didn't do that, so now we are waiting for that support person at Microsoft to see my email and respond with someone who can 'push' the update through.
I haven't had a reply back from the support person yet. When I do, I imagine the fix will happen soon after. I'll post here when I get more information.
As of right now, I have no idea if this is going to take a day or two, or weeks.