ok, Thanks for the help, God_Struth.
I have to say that my experience with this forum has been disappointing. It's a great forum when it works, and people here are always ready to help, but the forum can get messed up very easily. And it's almost impossible to troubleshoot. Only one solution: start from scratch again.
At least, now I learned my lesson: backup, backup, backup every single time you touch something. Even when you think you make a very minor change.
Ok, i have to go to sleep now....
Edited by nmottet