A comment showed up on my earlier post regarding elevation tags that don't update in stand-alone project files, which reminded me that I never posted this information though I intended to do so.
Steve Faust with Revolution Design let me know back then that the Elevation Fix utility they created is kind of a follow up to your blog post showing the problem. It was developed primarily by Nick Kovach who posted the ‘problem solved’ comment. You can find out more about their solution as well as downloaded at their SITE.
These are the previous three posts (October 2011):
Revit OpEd: Elevation Update Update
Revit OpEd: Elevation Update Update Updated
Revit OpEd: Elevation Tag Update Not Happening