In doing some runs with the osu_bibw test on a single node, we have
found that it hands when using the trunk for message sizes 2097152 or
larger unless the mpool_sm_min_size is set to a number larger than the
message size. We are not seeing this issue in the 1.2 branch. Just
checking to see if I am missed something or if I should be filing a
defect to trac this issue.