I also don't know if this is my player or if it's the video but when luke waves away the jawa who is eyeing his speeder the video changes brightness mid scene and then when luke starts to say "i don't understand how we got past those troops" it switches back in brightness.
EDIT: never mind i think this brightness switching is my player. I noticed it in quicktime but not windows media player. but bens cloak still looks a tad too dark as stated in my previous post