Lowercase for Category Archives., Directories are not being lowercased. Options

[unfoldedorigami]

I have upgraded to 3.11 and I would like to implement dynamic category archives. I am using the following code in the category archiving configuration, but the directories are not being lowercased:

CODE

<$MTCategory dirify="1" lower_case="1"$>/

EXAMPLE

This does not work -
http://depository.unfoldedorigami.com/cupb...pboard/journal/

This does work -
http://depository.unfoldedorigami.com/cupb...pboard/Journal/

The interesting part of this is that my individual entry archives work just fine with the lowercasing.

Here is the code :

CODE

<$MTEntryCategory lower_case="1" dirify="1"$>/<$MTEntryTitle dirify="1" lower_case="1"$>/

This works -
http://depository.unfoldedorigami.com/cupb...rary_skylights/

Am I doing something wrong? Is there some bug that prevents MTCategory information from being lowercased in category archives? Any help would be greatly appreciated. Thanks.