This really should not happen on Windows and part of the problem not fixed here is why show create table includes data directory when being run on Windows.  However, this patch fixes the bug in mysqldump.c

mysqldump.c:
  Added fixPaths function to convert \ to / in data directory and index directory entries only on Windows


client/mysqldump.c:
  Added fixPaths function to convert \ to / in data directory and index directory entries only on Windows
BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted