Now I think this is developing into an important issue. I just got my Flow hive yesterday, and on cursory inspection, everything looked fine. I had a few issues with no pilot holes and curvy rebates/rabbets, but the SBB looked OK to me from a distance. Today, I re-inspected my SBB in full daylight. To my mind, the gaps I see here are NOT bee-proof:
It might be worth a comment in the instructions to check this before installing bees @Cedar @beethinking
I have some jewelers pliers, and I will repair this myself, but you have to know it can be a problem, so that you can deal with it… 