When you save and there is an edit conflict (even with a different section), not
only does the edit conflicts screen appears (as expected), but also the edit is
saved (it shouldn't). This causes a lot of confusion.

http://en.wikipedia.org/wiki/Wikipedia:MW_1.5_bugs#Edit conflicts not working
anymore, and section edit broken

Version: 1.5.x
Severity: major
URL: http://en.wikipedia.org/w/index.php?title=Wikipedia:MW_1.5_bugs&action=history