I have only had this happen on the web player on Chrome, but it happens across all of my computers and I only use Chrome.  The web player stops after a song, but before a promo.  The play button becomes active, I click, the promo plays and it stops again, with the play button active.  I click and the song plays but it's not at the start, usually one verse in.  I've seen no mention of this on the forum, but it happens to me on several computers and on different networks.  My iPhone app doesn't do it, and it's not a big deal, other than always missing the first bit of a song after a promo.  Anybody else seen this?