An icon from (specifically Nuvola/icons/scalable/emblems/emblem-important.svg) by David Vignoni.

Modified to look more like the PNG file by Bastique. Recolored by _→AzaToth.

• 
  Gtk-dialog-warning.svg
• 
  Nuvola_apps_important_square.svg
• 
  Nuvola apps important yellow.svg
• 
  Nuvola apps important.svg
• 
  Icon_Now_Commons.svg
• 
  Icon_Now_Commons_orange.svg
• 
  Under construction icon-blue.svg
• 
  Laff_alert.svg
• 

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See and for more details. http://www.gnu.org/licenses/lgpl.htmlLGPLGNU Lesser General Public Licensetruetrue