ImageCache clear a XMP code which is present at the original image

Greetings to all.

On the site Internet apteka Maximum I have decided to spend optimisation of images using format XMP. In originals of images I have filled fields XMP necessary for me, however after processing of these images by ImageCache all XMP tags was cleared. An example Allokin-Alfa description (Reduced by means of ImageChage the image does not contain тегов XMP, and the original contains).

I suggest developers to pay attention to an increasing urgency of optimisation of images by means of XMP tags.