DP2m Lens Distortion Problem

I have been enjoying using the DP2m but noticed yesterday that my horizons are quite warped. Seems to be a flaw in the left hand side of the lens causing excessive barrel distortion. The right side looks OK to me. Please have a look and let me know what you think. It looks like I will have to get a replacement. The first is a landscape and the second is a photo of a photo(the top image edge is straight). Both processed with SPP 5.3.1. Joe