New bookmark-face is enabled by default in master, jarring background color
http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=ab6cb65cb2b6d11a7b690dfcea8d98611290fad9
+*** New user option 'bookmark-fontify'. +If non-nil, setting a bookmark will colorize the current line with +'bookmark-face'.
I will disable for now by setting bookmark-fontify to nil, but just wanted to give you a heads up.