[Edited to add: this applies to themes derived from "testing-dev", which have subalbum support]
In the absence of a pukka solution upstream of the page, this will sort subalbums by title. (You can easily work out how to sort by something else). In the file album.php, replace the entire div called "albums" with the following:
Your PHP version may not like the "&" in the "foreach" line, if this is the case, remove the &, it will still work, but will be making copies of the array elements instead of accessing them by reference. Slightly less efficient that's all.
(some long lines will have wrapped and may want repairing when you copy & paste this):
` <!-- Sub-Albums SORTED -->
<?php function printSortedAlbumThumbImage($alt, $thumb, $class=NULL, $id=NULL) {
echo "[img][/img]";
} ?>
<?php while (next_album()):
$title = getAlbumTitle();
$albums[$title]["title"] = $title;
$albums[$title]["url"] = wpGetAlbumLinkURL();
$albums[$title]["desc"] = getAlbumDesc();
$albums[$title]["thumb"] = getAlbumThumb();
endwhile;
if ($albums) {
array_multisort($albums, SORT_ASC);
foreach ($albums as &$album) { ?>
<div class="album">
<div class="albumthumb">" title="<?=$album["title"];?>">
<?php printSortedAlbumThumbImage($album["title"], $album["thumb"]);?>
" title="<?=$album["title"];?>">
<?php echo $album["title"]; ?>
<?php echo $album["desc"]; ?>
</div>
[hr]
<?php } ?>
<?php } ?>
</div>
`