I found this on a blog (somewhere). It worked perfectly for me, although the 43mb download took quite a long time - 2 hours or so.
Here is how to do it if you do the same thing I did.
- First, have AnyCut installed if you don't already
- Next, Create a new shortcut on your phone's desktop. Select "AnyCut" and then select "Activity"
- Select "Device Info" as your activity. I can't find any other way to get to this activity on the phone
- Press the new shortcut icon you have created.
- Scroll to the bottom and find the "Check for Updates" button. Click it. You may have to a few times for it to succeed.
- Once the "checkin" has succeeded, exit back to your home screen and you will be prompted to install the update.