currently,
?>
<style>
ul.jclist<?php echo $params->get('moduleclass_sfx');?> img {
width: 32px;
height: 32px;
}
</style>
<?php
is used in the mod_jcomments module to size the avatar. while this sizes the avatar, since it uses the img tag it also affects the smileys display in the module. so you can end up with wrong size smileys.
i imagine this can be fixed if the avatar output would be assigned a unique css property.