New in 1.2.0

• several bugs fixed, memory leaks reduced,
• internal housekeeping
• We have reduced the places where pnetcdf will call MPI_FILE_SYNC
• A new 'ncmpidiff' utility to compare two datasets in parallel
• Addressed a build failure when compiling with some versions of MVAPICH2. See ​http://lists.mcs.anl.gov/pipermail/parallel-netcdf/2010-July/001045.html for an example of the build failure.
• If you build this release and still get "undefined reference to 'yyin'", then you have some stale object files. "make clean" and re-build.
• additional error checking for collective routines

We have also made API changes to our non-blocking interface. CombiningOperations documents the changes. Our non-blocking semantics have been relaxed somewhat, and should be more usable in more situations. Please let us know if you have any comments or issues with the new interface changes.