I have noticed what appear to be a few mistakes in the MPI-2.2 standard. First of all, in two places, the functions MPI_DIST_GRAPH_NEIGHBORS_COUNT and MPI_DIST_GRAPH_NEIGHBORS are misspelled as MPI_DIST_NEIGHBORS_COUNT and MPI_DIST_NEIGHBORS. First on page 247 at line 30 and then again on page 595 at line 3. These misspellings also appear in the function index. The second issue I noticed is that the function MPI_REDUCE_SCATTER_BLOCK is omitted from several lists in Chapter 5. I believe it should appear in the list of collective operations at the very beginning of Section 5.1. Also it should appear in the list of all-to-all functions on page 135, line 1, and in the list of collective operations that apply to intercommunicators on page 135, line 32. Chris Thiel