Dept. of Echo - Revit MEP - Invalid Duct Fitting K-Factor Database

I've written about this issue a couple times in the past. A post appeared today on The Revit Clinic and Inside The System that deals with it occurring in Revit MEP 2011 now too. Here's the text of the "fix":
...snip
Recently, we have had several reports of this error happening in 2011, and in most cases, neither of these recommendations have fixed the problem. Generally, this error is a result of a 3rd-party DLL not being registered properly when installing Revit MEP 2011.

These are the steps to manually register the DLL, which should clear the above error:

1. Click on Start…Run
2. Type regsvr32 "C:\Program Files\Autodesk\Revit MEP 2011\Program\ASHRAEDUCTDLL.dll" in the window
3. Click OK

A dialog box indicating that the DLL was registered successfully should appear. If not, please proceed to the steps below.

1. Click on Start…Programs..Accessories
2. Right-click on Command Prompt
3. Select Run as…
4. Select Administrator
5. In the command prompt, type CD \ to get back to the root of C:
6. Type cd Program Files\Autodesk\Revit MEP 2011\Program
7. Type regsvr32 “ASHRAEDUCTDLL.dll"

After confirming that the DLL registered successfully, launch Revit MEP to confirm that the error no longer appears.
...snip