I also bought the Display theme and is experiencing the same error. I understand that you have a lot of emails received regarding support but I think it’s best you release an update to the CSS of this theme, instead of asking users who paid for the theme do the work for you. You’re also wasting time answering all posts here when you could have spent the time editing the stylesheet of the theme and having it fixed once and for all. Not all of your buyers are expert coders.
P.S. Having a lot of support emails, and bragging about it also reflects bad on your company. That just means that there is a lot of things wrong with the “PREMIUM” themes you’ve been releasing.