Just loaded an MM app from a friend and installed MM 2.3. These are the WebConfig entries:
add assembly="Mere Mortals Framework Web Forms 2005, Version=2.3.0.0, Culture=neutral, PublicKeyToken=E35DC9DDAD261220"
add assembly="Mere Mortals Framework Interfaces 2005, Version=2.4.0.0, Culture=neutral, PublicKeyToken=2312FEFB461DBB0E"
add assembly="Mere Mortals Framework 2005, Version=2.3.0.0, Culture=neutral, PublicKeyToken=511BD18E16C7F771"

When I try to run the app, I get the following error:

Error 92 Could not load file or assembly 'Mere Mortals Framework Interfaces 2005, Version=2.3.0.0, Culture=neutral, PublicKeyToken=2312fefb461dbb0e' or one of its dependencies. The system cannot find the file specified. /


I deleted and re-added the assemblies and re-started VS2005 and still got the error.

Bruce Parker