diefenbach/django-lfs — pull request #17 by prinzdezibel (2012-06-21 07:39:12+00:00)
Title: Bugfix for thumbnail generation of transparent PNG images

Bug-Fix: Don't convert images with mode RGBA to RGB. That results in loss of alpha channel (transparency)

Reproduce bug: Upload an png image with alpha channel and see how all transparent pixels are replaced through black pixels.