I just played about 2 floors of a new game in version 1.013, and I came across two things that I'm not entirely sure I observed correctly. These might be bugs, or they actually might be me not paying close attention to what I was doing, however I felt it worth pass along in case anyone else notices this behavior, too.
First of all, while using the Red Shift Mech (and thus had no starting shields), I took a point of damage on the first floor, but otherwise got a perfect against the boss there. I was then awarded the Untouchable achievement (completing a floor with no damage), which shouldn't have happened.
Secondly, I'm not entirely sure, but I may have missed going up a level and forgot to take an upgrade perk at that time. Once I realized I had a perk to select, I pressed the button to bring up the 3 perks to choose from, and selected the one that grants you 5 keys. Then, a second upgrade perk selection window appeared (making me think I actually went up 2 levels without realizing it), and I chose something else. I didn't realize it until a few rooms later, but I don't think I actually got those keys, as my key counter was sitting at 0 after opening up at most one door. So, I'm really not sure if I did go up 2 levels or not - the perk selection might have been bugged and simply regenerated a new list of 3 for me to pick from after I tried to choose one.
Sorry for these bug reports being a bit vague! I hope it's detailed enough for someone else to see if they notice the same behavior.