No big deal but it has been a hassle.
+1 to that. I clicked on one of the TV series (Gunsmoke) last night and, after a long wait, got the "Unavailable". I tried another (Married With Children), which I had watched the first 14 episodes earlier. It took probably 3 or 4 minutes to get to the episode to watch next. However, it was episode #11. I clicked on choose another episode and scrolled to #15 and watched it. When that show ended and it jumped back to the episode menu, I watched as the episode number changed from #15 to #8 (it should have incremented up to #16).
Hopefully, Netflix is frantically working on a fix! No biggie so far for me but, with 20 million subscribers this is bound to really piss off somebody!