When trying to sort my cthub XML file recently I found out that my code from the post on sorting the role listing had stopped working.
Turns out that there was an error introduced into the format of this file when upgrading from Contribute 3.11.
As you are no doubt aware, when at least one admin upgrades to Contribute 4 or Contribute CS3 (aka 4.1) all the admins have to since there are upgrades made to the XML files that control the site. Well it appears that this upgrade makes the cthub file non-valid XML.
Take a look at this file and look for the tag font_use_css inside the group_list_item child node of the group_list node. In a copy of the cthub file that was upgraded you will find that this standalone tag is missing the appropriate closing slash. If you compare this against a copy of the cthub file from before the upgrade, assuming you made a backup, you will find that the tag is properly closed.
Since this file is the master file with all of the role information for the site, I wonder if this XML error is causing unknown instability in the system somewhere.
While this is an easy fix, I will be posting some code that you can run to fix this, since editing a file like this by hand can be a real pain.