Last modified: 2013-02-08 23:15:32 UTC
1) Open http://www.mediawiki.org/wiki/VisualEditor:Test 2) Press: a Enter b Enter c 3) Select b with the mouse, set style to Preformatted 4) Click after c 5) Backspace as much as you can Expected result: c, b, a disappear Actual result: c disappears, subsequent newline disappears, then nothing disappears anymore.
Confirm similar bug in Firefox, not in Chrome or Safari - c disappears, then b looses its PRE formatting and the cursor jumps to the left side of b, then a disappears.