I couldn't find this problem mentioned anywhere else, I hope to not create a duplicate. I was playing 'Against the Cockroaches' and in the 3rd battle the area on top of the screen showing the monsters' decks became all messed up. There should be 3 groups of cockroaches and Morvin, but only Morvin and 1 group are clearly visible, the other 2 cockro groups are hidden underneath them. I was playing with a Mac Book Air 11-inch, the resolution is 1366x768. I will try to reach again the 3rd battle and check with the same and different resolutions to replicate the issue.
I believe you are looking for this: http://www.cardhunter.com/forum/threads/top-bar-problem.1082/#post-18795
Thanks Phaselock, I see that you already explained the issue extensively... I'll go back to learn how to do proper forum research before posting!