mcMMO Problems and Outdated PermissionsEx

Hi, I'd like to let you know that a new version of PermissionsEx is available and is compatible with version 1.8+, and is labeled as version 1.23. This would be highly beneficial to many server admins who prefer the use of this permissions plugin over the others.

Also, I'm having plugin issues - when configuring mcMMO's .yml files, the changes never seem to stay. They appear to stay for other plugins, but not this specific plugin's.

Thanks for reading, and I hope the issue is resolved.

I tried to modify the settings in "plugins/mcMMO/config.yml" and "plugins/mcMMO/advanced.yml" when the server was shut off and found that they had reset upon starting the server up again. Do you have any other suggestions?

EDIT: Just tried, saving changes in other configuration files for other plugins does work, just not mcMMO for some reason.
EDIT2: Save button and Ctrl+S don't work for mcMMO, same deal as above edit.

Also, I've come across an awesome plugin on a server that makes libraries/bookshelves more useful: http://dev.bukkit.org/bukkit-plugins/bookshelf/