We get leaks between the panes too when driving in heavy rain, so we just roll up some paper towel and stuff it there to help with the spray that gets forced in.
We also had the rear window problem as ours was one of the first models off the line but FR recalled and replaced the windows from that generation. Some early 2010 models were also built with the faulty back window. If you can somehow find out if your back window has been replaced or not, FR has in the past provided the replacement window to the dealer of your choice for free. However FR does not cover the labor cost for actual replacement unless you're the original owner.
We are currently dealing with dewinterizing (finally!) and finding a mysterious leak/condensation from somewhere behind the fridge.