Element finder crashes when default content contains special characters.
If you select for example the file "tést.txt" as attachment, it gets uploaded and selected correctly. When you leave the page (publish object / send message / ...) and you return (try to edit whatever object this element is attached to) the element finder crashes on the "é", displaying nothing, and just stops working.
This also happens with the user_group_finder which extends the element finder, if a default selected name contains a special character (such as é) the finder crashes.
This leaves you in situations where you are unable to edit, upload or select an existing or a new attached document, unable to manage the participants in a discussion, unable to reply on a message when recipient names contain special characters...
Since the user_group_finder is used everywhere when publishing an object, and e.g. french names tend to have a lot of special characters, this is a major bug.