So long story short went and saw TDKR on opening night at a normal screening, enjoyed it and could understand ALL the dialogue.
Today my daughter asked to go to the IMAX screening and well that was painful! The sound wasn't loud it was cover your ears loud! The volume was so loud you couldn't even understand the dialogue for most of the movie.
When I spoke to staff about the issue, I was informed the the volume was set by Nolan himself... Really??? IS this guy hard of hearing?
As we all know the movie is outstanding but IMAX just made me understand why everyone was commenting on the dialogue issues.
Enjoy the movie just beware the IMAX.