Occasionally, the potion shops will only offer Health and manapotions, but nothing else. To be clear: I haven't purchased anything from the potionshops when that happened. I'm not sure how to reproduce that bug, but it has happened a few times to me now.
I appear unable to reclaim locker items lost in a previous run. The dialog pops up, and I click yes to pay the gold, but the gold doesn't get subtracted and I don't get the item back (haven't tried with anything but fabulous treasure).