It's the media-playback-start icon plus a question mark.
PS: back reference post - http://www.hydrogenaudio.org/forums/index....st&p=546592
Full Version: Random Button - GNOME 2.18 style
Thanks..... 
...and if there was a blue version I would be even more thankful
...but again, thanks.
...and if there was a blue version I would be even more thankful
...but again, thanks.
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