A quick search through CPAN (provided by http://cpansearch.bulknews.net/) provides me with following ugly usages of glob that will not work for quoted spaces in the path, as the path is otherwise used for directly constructed filenames too:

Mac::iPod::GNUPod

  ...
  my $path = File::Spec->catdir($self->{mnt}, @path);
  ...

  # and

  $self->add_song(glob(File::Spec->catpath($self->{mnt}, "iPod_Control
+", "Music", "*", "*")));
[download]

($self->{mnt} is supposed to be the mount point of the iPod)

Mail::Action::Role::Purge

   my $dir = $self->storage_dir;
   ...
   my @files = map {
            scalar( s/\.$extension//, basename $_)
        } glob("$dir/*.$extension");
[download]

($self->storage_dir is supposed to be the directory for storage, unquoted)

CDDB::Fake

...
foreach my $dir ( @ARGV ) {
  unless ( -d $dir ) {
    warn("$dir: not a directory -- skipped\n");
    next;
  }
  ...

  my @files = sort map { $1 if /([^\/]+)\.mp3$/ } glob("$dir/[0-9]*.mp
+3");
[download]

Same as above

I stopped here, on page three of the results (when searching for glob).In short, a directory and it's glob-safe quoted string are not usable interchangeably, and thus will lead to problems with the authors that can't imagine/foresee whitespace in filenames.

As an aside, the cpansearch doesn't seem to like searching for "glob(", which would exclude a lot of "typeglob" results.