Hi,
a problem I have with JRemote on my iPad is with the an album that has a slash ( / ) in its album title. The album somehow appears in JRemote, but only with the name and a white square as a picture. Opening the album, a text says "No content found here..." I can open the album with MediaCenter (version 20) where it shows up nicely and I can play it from there.
I renamed the physical folder to try if this helps, but it didn't. Also there are no slashes or other special characters in the track names. I then renamed the meta tags of the album's title (replacing the slash with a dash) and added that to my library as a second version of the same album and everything is fine with that. As nothing else was changed, my guess is that JRemote has problems with the slash of the album's title (and maybe other special characters).
Sorry if this problem was posted and discussed before, I haven't found it.