Last modified: 2014-06-13 17:17:40 UTC
This may be related to the fact that we use javascript: URLs for buttons.
This is specifically on the edit screen, after you have made a change.
Change 139315 had a related patch set uploaded by Mattflaschen: Add preventDefault so beforeunload popup doesn't show in IE https://gerrit.wikimedia.org/r/139315
Change 139315 merged by jenkins-bot: Add preventDefault so beforeunload popup doesn't show in IE https://gerrit.wikimedia.org/r/139315