I just had a bit of a surprise. I just opened up four boxes of ilford pan f 35mm film. They had been in my fridge for several months. Possibly just at freezing temp. When I opened the boxes I found that each of the four canisters had their caps off. That's right - in unopened box with caps OFF. Don't know how that happened. So they've been at freezing temp with the caps off. So... are they any good? I've never encountered this before. I don't want to shoot and process them if the film has 'freezer burn'. What do you think?