Here's a scan from a pane of 20 of the Barbara Jordan stamp issued today (09/16/2011). Has anyone else picked up this issue?

I'm curious about something: There is a black diagonal line above the last "a" in "Barbara" that looks as if it supposed to be part of the outfit that she is wearing. It is on all 20 stamps of the pane I bought, so I assume it's normal, but yet it still looks out of place. Furthermore, when you look at a preliminary scan of the stamp offered by the USPS, there is no such diagonal line shown:

I'm curious if this line is standard on all of the Barbara Jordan stamps?
Comments?