I took a look at your thread at that link but don't necessarily follow it all yet. I don't think I want to glob for any of this. Does this look like a fairly robust way to download images and rename them uniformly but with correct filetypes?

 $ perl lh2.pl
img: WWW::Mechanize::Image=HASH(0xa1fdc5c)
https://sites.google.com/site/lutherhavennm/_/rsrc/1255408739014/missi
+on/Attachment3.jpg?height=278&width=420 
ext: jpg?height=278&width=420
ext: jpg
img: WWW::Mechanize::Image=HASH(0xa207784)
https://sites.google.com/site/lutherhavennm/_/rsrc/1255386973661/missi
+on/Picture1.jpg?height=279&width=420 
ext: jpg?height=279&width=420
ext: jpg
img: WWW::Mechanize::Image=HASH(0xa2078ec)
https://sites.google.com/site/lutherhavennm/_/rsrc/1255408642180/missi
+on/Attachment10.jpg?height=280&width=420 
ext: jpg?height=280&width=420
ext: jpg
img: WWW::Mechanize::Image=HASH(0xa2074dc)
https://sites.google.com/site/lutherhavennm/_/rsrc/1255387202014/missi
+on/Looking%20up%20at%20the%20Bldg.JPG?height=315&width=420 
ext: JPG?height=315&width=420
ext: JPG
downloaded 4 images from https://sites.google.com/site/lutherhavennm/m
+ission
to folder site_17
$ cat lh2.pl
#!/usr/bin/perl -w
use strict;
use feature ':5.10';
use WWW::Mechanize;
use LWP::Simple;
use Errno qw[ EEXIST ];

# get information about images
my $domain = 'https://sites.google.com/site/lutherhavennm/mission';
my $m      = WWW::Mechanize->new();
$m->get($domain);
my @list = $m->images();

# create new folder and download images to it.
my $counter = 0;
my $dir     = &mk_new_dir;
for my $img (@list) {
     print "img: $img\n";
    my $url = $img->url_abs();
    print "$url \n";

    my $ext = ($url =~ m/([^.]+)$/)[0];
    print "ext: $ext\n";
    $ext =~ s/\?.+//;
    print "ext: $ext\n";
    $counter++;
    my $filename = $dir . "/image_" . $counter. '.' . $ext;
    getstore( $url, $filename ) or die "Can't download '$url': $@\n";
}

# output
print "downloaded ", $counter, " images from ", $domain, "\n";
print "to folder ", $dir, "\n";

sub mk_new_dir {
    my $counter2 = 1;
    while (1) {
        my $word = "site";
        my $name = $word . '_' . $counter2++;
        if ( mkdir $name, 0755 ) {
            return $name;    # success, return new dir name
        }
        else {
            next if $!{EEXIST};    # mkdir failed because file exists
            die sprintf "(%d) %s", $!, $!;    # other failure; bail ou
+t!
        }
    }
}
$
[download]

Is this how all images on the net really look to servers, with the size information on them as well? Where do I find information about the url_abs() method here? I don't see it in either of the modules used.

No.

And the first few lines look as though you're trying to make something up as you go; don't know how to cut'n'paste; or are yanking our chains.

Or, maybe, need this reminder:

Please, separate your record of output from your code.

Alright, well I previewed the terminal output as a normal paragraph, and that doesn't work at all because the newlines disappear, so I hope the best way is to use separate code blocks for terminal output and then a code listing.

 $ perl lh2.pl
img: WWW::Mechanize::Image=HASH(0xa8acc5c)
https://sites.google.com/site/lutherhavennm/_/rsrc/1255408739014/missi
+on/Attachment3.jpg?height=278&width=420 
ext: jpg?height=278&width=420
ext: jpg
img: WWW::Mechanize::Image=HASH(0xa8b67cc)
https://sites.google.com/site/lutherhavennm/_/rsrc/1255386973661/missi
+on/Picture1.jpg?height=279&width=420 
ext: jpg?height=279&width=420
ext: jpg
img: WWW::Mechanize::Image=HASH(0xa8b6934)
https://sites.google.com/site/lutherhavennm/_/rsrc/1255408642180/missi
+on/Attachment10.jpg?height=280&width=420 
ext: jpg?height=280&width=420
ext: jpg
img: WWW::Mechanize::Image=HASH(0xa8b6524)
https://sites.google.com/site/lutherhavennm/_/rsrc/1255387202014/missi
+on/Looking%20up%20at%20the%20Bldg.JPG?height=315&width=420 
ext: JPG?height=315&width=420
ext: JPG
downloaded 4 images from https://sites.google.com/site/lutherhavennm/m
+ission
to folder site_18
$ cat lh2.pl
[download]

#!/usr/bin/perl -w
use strict;
use feature ':5.10';
use WWW::Mechanize;
use LWP::Simple;
use Errno qw[ EEXIST ];

# get information about images
my $domain = 'https://sites.google.com/site/lutherhavennm/mission';
my $m      = WWW::Mechanize->new();
$m->get($domain);
my @list = $m->images();

# create new folder and download images to it.
my $counter = 0;
my $dir     = &mk_new_dir;
for my $img (@list) {
     print "img: $img\n";
    my $url = $img->url_abs();
    print "$url \n";

    my $ext = ($url =~ m/([^.]+)$/)[0];
    print "ext: $ext\n";
    $ext =~ s/\?.+//;
    print "ext: $ext\n";
    $counter++;
    my $filename = $dir . "/image_" . $counter. '.' . $ext;
    getstore( $url, $filename ) or die "Can't download '$url': $@\n";
}

# output
print "downloaded ", $counter, " images from ", $domain, "\n";
print "to folder ", $dir, "\n";

sub mk_new_dir {
    my $counter2 = 1;
    while (1) {
        my $word = "site";
        my $name = $word . '_' . $counter2++;
        if ( mkdir $name, 0755 ) {
            return $name;    # success, return new dir name
        }
        else {
            next if $!{EEXIST};    # mkdir failed because file exists
            die sprintf "(%d) %s", $!, $!;    # other failure; bail ou
+t!
        }
    }
}
$
[download]