Multi-part binary posts whose segment specifiers are not 
zero-filled, IOW, numbered 1,2,...,20/20, are not shown
as being complete in the article list. An example to clarify:

A multi-part binary has titles:

foobar.mpg (1/30)
foobar.mpg (10/30)
foobar.mpg (11/30)
...
foobar.mpg (19/30)
foober.mpg (2/30)
foobar.mpg (20/30)
...
foobar.mpg (29/30)
foobar.mpg (3/30)
foobar.mpg (30/30)
foobar.mpg (4/30)
...
foobar.mpg (9/30)

will not be shown to be complete, even if all parts are there.
However, if the single-digit segments are numbered "(01/30)",
they are marked as a complete binary.

This is not a major bug, IMO, because pan will assemble the
parts into a proper binary, anyway. It's just not shown as
complete in the article window.