User added the words "La mui" to https://fr.wikipedia.org/wiki/Audiomachine#Utilisations_de_leurs_musiques . Then proceeded to edit elsewhere in the page. When he went back to those words, he found out he couldn't remove them at all (see screencast at https://www.youtube.com/watch?v=IMlMZt1FMvY : all his actions seem to affect the header below). When he reviews his changes, that content is actually not there.
Windows 7, Firefox Aurora 35.0a2 (2014-11-05), Vector.
Version: unspecified
Severity: normal