So I've now tried four packs of the newest generation of impossible film. I'm noticing that in some of the colour shots that I'm getting a yellow stain at the very top of the photo. It's much more pronounced in their black and white film and I've noticed it in every shot in that pack. These stains showed up approximately two days later, after being left to cure in a light proof box, and were not initially visible. I've seen a similar thread about their 8*10 film but that film does not have an acid in the upper trap to neutralize the development chemicals. I have several packs more of film coming in the mail and will have the chance to see if this is unique to my first batch or not. Has anybody else noticed this in their sx70 integral film?