Heirloom Toolchest tr: error(s) trying to delete the complement of a set containing a multibyte character?

I’m trying to use the tr command from the Heirloom Toolchest to overcome a current limitation of the coreutils implementation, so as to be able to “pump” (with the -dc options) multibyte characters from a “random” generator (/dev/urandom) to the terminal. Noteworthy is the fact that this has been compiled from source on Archbang after having failed to do so using the AUR version(s).