> Have you updated tdebase with the latest r14-xdg-update script? That script renames all of the user's 
>tdevelop related config files. If you are unsure, update the script and run the script with the 'force' 
>parameter while not logged into Trinity.
Yes I did.
The error message refers to a KDevTDEAutoproject plugin, but looking to what is installed in /opt/trinity, I only see TDEDevTDEAutoproject files.
KDevTDEAutoproject is also hardcoded in several source files.
Most likely there is something still to be done on it.

Cheers
  Michele