I Calin,
thanks for your answer.
First of all our gallery is the basic one on WordPress, it is not particular or created through external plugins
I tried to deactivate ALL plugin except tagDiv and the old galleries don’t work.
It’s so strange because we only uploaded the theme and nothing else so it must be work the same as up to now.
It is a big problem for us because all the galleries inserted so far in the past years (and there are really many) do not work.

I also have another request from my client: do the galleries only have this new layout (the one in the guide linked above – tagdiv slider gallery) or is there the possibility of doing them differently (perhaps with external plugins)?

Thanks
Claudia

Thank you so much Cris!
Now it seems to work and it doesn’t show news more than once in the page!

Thanks again! 🙂