Sort order of People Directory is not alphabetical for case sensitive entries

The sort order for entries in the people directory uses case-sensitive sorting to place lower-case entries after all upper-case entries. This results in users beginning with lower-case names being placed out of their expected case-insensitive ordering:

Actual ordering looks like:
Adam
Ziggy
bert
xena

But should look like:
Adam
bert
xena
Ziggy