Created attachment 134976 [details]
In tango and sifr, the icon assigned for the regular special character button isnt used for the special character group button.
Yousuf Philips committed a patch related to this issue.
It has been pushed to "master":
tdf#110354 fix missing icon for special character group button
It will be available in 6.0.0.
The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.