The left menu in the main blog home page, showing the list of blogs, was sorted case-sensitively, with lower-case elements such as teiJournal sorting after all the upper-case ones. Investigated this, and found that the sorting code is in this page:

/blogs/skins/_bloglist.php

This code basically creates an array of the blog list item tags, indexed on the blog name, and then sorts it using ksort. Lower-casing the blog name before it's used as the array key solves the problem, so I've implemented that fix.