Breaks standard user column hooks?

Hello,

we have a plugin which uses following hooks and after installing your plugin, these stop working:

manage_users_columns
manage_users_custom_column

The plugin is Thoughtful Comments: http://wordpress.org/extend/plugins/thoughtful-comments/

Is this a bug in your plugin?

What happens to these hooks? Do you just disable them by design?

Please let us know.

Thanks,
Martin

http://wordpress.org/extend/plugins/custom-metadata/