Land Cameras hate snow
Or essentially every camera for that matter. I picked up a 450 not too long ago and realized I was having some problems. Apparently, I wasn't the only one. The 450, which has a built in timer, has been plagued with problems from focusing to development of the film. Luckily I got one of the minor issues with mine. The thing I love about the land cameras is the film in which you have peel apart after about a minute (depending on temperature) for it to develop. However to do this the film has to slide through two steel rollers that essentially pop the chemical bag on the top of the picture.
The 450 doesn't like to do this.
Because of the built in timer, the film rarely catches the rollers and leads to an empty white piece of photo paper. To give it a little help, you have to open the back just a crack while pulling on the tab, thus forcing the film to finally reach the rollers. It's a pain in the ass but the results are always worth it.