Hi @saguaros
did you also install multiple template frameworks, like the T3 and/or Helix and/or Yootheme, and create a menu item for each theme with for example a contact form?
Also, I have the error reports set to maximum.
I use this assignment to test the outputs for my extensions with all frameworks.
I suspect because Joomla always loads the events from the system plugins, that it would make sense to prevent the T4 framework from running unless the template is also being used.
Addition:
I did not have this problem with the previous version.