do you have original unedited photo? or is that unedited?
might be improper handling of barrel distortion.
actually, i am looking it over and over again, i think it might be because the middle part is not straight in the first place.. eveyrthing else checks out fine.![]()
http://www.flickr.com/photos/xsheree/3391764321/
this is the unedited part. well at least, unedited on the lens distortion.