For me anyway, when I use the read or readany message to an fpic in a mira frame the picture doesn't show up on my iPad. If I use the pic message and the whole path to the file, or just put it in the search path then it shows up.
Yeah, fpic is giving me a hard time to. We're working on a fix, but in the mean time a good work around is to set the pic attribute of fpic instead of using the read or readany messages, as well as using absolute paths. Something like this: