This too happened to me (it was 5 degrees, and I washed the car earlier in the day, go figure). Thankfully, I was at work and took the panel off, used a heat gun, and a big glob of white lithium on the latch and all the internals. So far, this has worked great, even though I greased everything up in the fall and granted it hasn't been been freezing lately. Just know you aren't alone and hopefully this is the only fix you need. Hope this helps, and yes, from time to time I hate to say it, we are all reminded about Ford's cost cutting measures.
Sean
