Sure +Ade Oshineye
. Two in particular right now:rel="publisher" colliding with rel="author"
While I believe that Google can actually parse this correctly and displays it the 'right' way, the tool throws and error and often displays the publisher image instead of the author image. Both will likely confuse users.email Author verification not supported
My tests seem to indicate that while the new email verification works and will generate Authorship, the RSTT does not support this method and will present a false negative (i.e - error).
I can provide examples if desired.