Version 1.5.6
-------------
- pvfs_open() does not always preserve permissions correctly (ie,
  it may be possible to to open a file O_RDONLY and then issue
  pvfs_write() operations to it)

- O_EXCL in pvfs_open() does not work correctly across clients.

- the maximum socket index (used for select) _may_ be drifting
  high over time, though we have not verified it.

- valgrind reports errors when run against the mgr process.

Version 1.5.3
-------------
- pvfs_read_list() and pvfs_write_list() don't work correctly and should
  be avoided for now.

Version 1.5.2
-------------
- Unlink returns "Resource temporarily unavailable" error on large 
  files.  Perhaps a timeout-related issue?

  Timeouts were increased, and we have not heard any more reports of
  this bug.


Version 1.5.1
-------------
- NR_OPEN was defined to be 256 internally.  This causes problems with
  parallel applications running on more than 126 processes and then
  opening PVFS files.

  Fixed in 1.5.2-pre1.
