I was editing the subsection "Privacy of kept history data" of the following page
http://en.wikipedia.org/wiki/Web_browsing_history
when it was at this revision:
http://en.wikipedia.org/w/index.php?title=Web_browsing_history&oldid=393373130
I pressed the View Changes button and saw some changes to other parts of the page - which confused me initially, as I couldn't have possibly made such changes, as I wasn't editing those sections at the time. Then I quickly realised it was an edit conflict, so I pressed the Save button to make it go to the edit conflict screen, which it did.
However, the upper edit box only contains the first section (the anonymous intro section) - which is *not* the section I had been editing, by the way. The lower box boes contain the full article, I think.
I have some user scripts installed in my user.js on Wikipedia, so they may be affecting or causing this bug.
Version: 1.16.x
Severity: normal