After upgrading to 1.27.0-wmf11 at least on cswiktionary different HTML (according to folks on IRC it is mobile) at least of headings is being delivered.
Randomly, no pattern found yet.
Servers which delivered the incorrect content so far:
- mw1257
- mw1109
- mw1103
First occurence spotted cca 2016-01-21 19:40 UTC.
Delivered HTML for headline:
<h2><span class="mw-headline" id=".C4.8De.C5.A1tina">čeština</span><span><a href="#/editor/1" title="Editovat sekci: čeština" data-section="1" class="mw-ui-icon mw-ui-icon-element mw-ui-icon-edit-enabled edit-page icon-32px">Editovat</a></span></h2>
Expected HTML for headline:
<h2><span class="mw-headline" id=".C4.8De.C5.A1tina">čeština</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=leetspeak&action=edit&section=1" title="Editovat sekci: čeština">editovat</a><span class="mw-editsection-bracket">]</span></span></h2>
The delivered HTML causes sections unable to be edited, since clicking on the edit link triggers no action (and goes nowhere, since it is a page fragment URL).
Further issues description in {T124356#2050230} and {T124356#2050285}