I'm only seeing the behavior with FR, so I'm pretty sure it's not on my end.
Yes, same here. That particular problem (the blank page) seems unique to FR.
LOL! It just happened again on my first attempt to post this (blank page). However, I checked 'pings' to see if the post did get through before I sent it again. My guess is that some folks might not be checking before resending, thus one possible reason for the double postings.