In new Xposed Installer v2.6, there is new "puzzle" app icon (see this http://xdaforums.com/showpost.php?p=52535779&postcount=37)
If you like old one, just install and enable this module and Xposed Installer icon will be changed to old one.
Download module from Xposed repo: http://repo.xposed.info/module/com.pyler.xposedoldicon
If you like old one, just install and enable this module and Xposed Installer icon will be changed to old one.
Download module from Xposed repo: http://repo.xposed.info/module/com.pyler.xposedoldicon