I have tested this library in my own code for some time, so I hope it is at least somewhat robust barring any distribution bugs. It has been used successfully between an 8051 (big endian) and a Pentium 4 (little endian). I hope I've also solved some floating point portability issues for good.
Nonetheless, there naturally may be bugs remaining. If you can find any - or if it just doesn't work! - I would very much appreciate a note with as much detail as possible on the problem.