Interoperability between Avro 1.6.2 and 1.5.1

[Sameer Deokule]

Hello,

 Would anyone be able to comment on what may not work between
  Avro 1.6.2 and 1.5.1 ?

  We have an existing Java component serializing data using Avro 1.6.2.

   We are considering a C++ de-serializer that would work on the above
serialized data
   and want to identify what may be incompatible if we use Avro 1.5.1.

Thanks
Sameer