Same problem here as well. Works fine on my iPhone 4S...but, on my iPad2 and my iPad Mini Retina, it does not.
I was part of the discussion on the Apple Support forum. But, as I made a remark that Apple is becoming more and more careless about such things, they deleted nearly every post I made about the matter in the entire thread and then sent me a threatening nastygram about my failure to shut up and love Apple.
By all reports 4.2 does indeed work.
My problem is that I am also having Time Capsule problems (with a nearly brand new Time Capsule...go figure) and seem unable to get the appropriate files back off of it in order to move back to 4.2.
Does anyone have the App and .ipa files for Remote 4.2? I'd really appreciate it if I could get them from you if so.
....sT