I thought it strange that up until yesterday, I was able to add a generic content mod and was able to edit it.
I have done some tests now and it seems that I can edit the Generic Content modules in the news section I was working on yesterday which works off a different template to other pages.
The other pages however do not allow me to edit the Generic Content mods on using that specific template.
Here's what I can tell you.
- More than a week ago we renamed the templates using a method you described in one of your forum posts to someone else.
- We have also since upgraded SF to SP4.
Although we tried to make sure that all tests were fine, we cannot check everything and only now have noticed that this error is happening on specific templates.