ghost revs/inconsistent parents/missing revs in bzr check

[Parth Malwankar]

Hello,

I just ran "bzr check" on a branch I am using. This
gave the following numbers.

   1497 revisions
   3260 file-ids
   7318 unique file texts
942118 repeated file texts
      0 unreferenced text versions
    122 ghost revisions
    122 revisions missing parents in ancestry
     55 inconsistent parents

If I understand "bzr check help" correctly, I need
not worry about the first 5.

Should I be concerned about the last 3?

What are ghost revisions? I couldn't find any info on
it (might have missed it).

I am using bzr 1.13 (format 1.9-rich-root).

Thanks.
Parth