I didn't see this written out anywhere so I thought I'd post to help anyone else along with this. If you run a notification list you may have noticed that due to its PERLish nature emails in the Notifications menu show up alphabetically, but all the uppercase ones are first, then it starts over with the lowercase ones. This code modification will make it all alphabetical regardless of case. This change takes place inside CMS.pm (generally located in the /mt/lib/MT/App folder) around line 1140/1150. Here's the lines we're looking for:

CODE
if ($type eq 'notification') {
@data = sort { $a->{email} cmp $b->{email} } @data;
for my $i (0..$#data) {
$data[$i]->{is_odd} = $i % 2 ? 0 : 1;
}


Change the @data line to:

CODE
@data = sort { lc($a->{email}) cmp lc($b->{email}) } @data;


and you're all set. Now the emails in your list will be in true alphabetical order. This has been tested and works in MT 2.64.