Tips Cannot make my IMDB watchlist public?

Each time I try to change my IMDB watchlist from "private" to "public", it seems to be changed but comes back to "private" once I click on "Done".

This is a bug in the IMDB interface. There is fortunately a workaround: after changing the status of the list, add a movie in that list before clicking on "Done".

This bug is reported here.