You can probably "force" this to happen by choosing an extremely popular article on http://www.wikipedia.org (such as the main one currently referenced on the main page), start a almost null edit, wait 30 mins and try to save.
"Colleen Robledo" colleenrobledo@gmail.com wrote in message news:7bb974980607271014n7bcb8995ua92e84a4474442aa@mail.gmail.com...
Hello. Trying to find out what happens if 2 users to to edit the same article/section at the same time? Does the 2nd user get a "read only" access-type message indicating the article is locked for editing by another user? Or will one user's edits overwrite those of the second user? Thanks, Colleen Robledo