I was able to find other scans of Hirano Aya's appearances in
Shounen Sunday over the last two years.
She's got short hair in most of them.

Shounen Sunday 2008 No.43
http://www.usagi.org/doi/seiyuu/books/comics/shounen-sunday2008-43.html

Shounen Sunday 2009 No.13
http://www.usagi.org/doi/seiyuu/books/comics/shounen-sunday2009-13.html

Shounen Sunday 2009 No.35
http://www.usagi.org/doi/seiyuu/books/comics/shounen-sunday2009-35.html

dig in the following for bigger scans
http://www.usagi.org/magazines/sunday/

--
Hitoshi Doi
                         " this space for rent "
http://www.usagi.org/doi/                                    doi@usagi.org