I copied part of a header from one page on se.wikimedia and pasted in an already started header on another page. After my paste the symbol ☀ was added:
(Page I copied from: https://se.wikimedia.org/wiki/Projekt:Offentligkonst.se_2014/Ans%C3%B6kan_till_Vinnova )
I used Google Chrome Version 35.0.1916.153 on Ubuntu 14.04.
Version: unspecified
Severity: normal