[0] http://i.imgur.com/6B9JkjC.png
!@#$%^&*()_+
http://paste.click/KNIJov
http://paste.click/PPjKXC
http://paste.click/RtZCtG
As I turned up the bias, it seems to trend to the letter g:
http://paste.click/hJrVlX
Some symbols seem to just fail, I'm guessing that's a bug in the serializing.
[0] http://i.imgur.com/6B9JkjC.png