Proof of a ghost?

A picture showing a person looking out the window at Tantallon Castle, a 14th century Scottish castle is believed to be an authentic ghost photo. The photo was taken by Christopher Aitchison in May 2008, and investigated by Richard Wiseman a professor at the University of Hertfordshire.

Experts who examined the photo concluded that the photo could not have been faked, and of course it’s highly unlikely that anyone would dress up in period costume and stand beside the window (but who knows?). Check out the photo here:

http://www.thesun.co.uk/sol/homepage/news/article2343015.ece

The picture was voted the most authenthic ghost picture by visitors to the blog:

http://www.scienceofhauntings.com/

An attempt was also made to recreate the picture, but it wasn’t convincing.

http://scienceofghosts.wordpress.com/2009/04/05/investigation-into-world-famous-castle-ghost/

Well, definitely, the picture does appear to show someone dressed in some sort of ruffed clothing, and the face looks “olden.”

The question is, is this proof of a ghost?