Taking a look at the groups plugin start.php I see the following:
$CONFIG->group = trigger_plugin_hook('profile:fields', 'group', NULL, $profile_defaults);
The $profile_defaults contains the name, description, brief description, etc.. fields.
My guess is that some plugin is registering for that hook and altering the return value.. I can't tell for sure as my groups edit action is fine.
Try installing the excellent 'Elgg Developer Tools' plugin (http://community.elgg.org/pg/plugins/project/384962/developer/costelloc/elgg-developer-tools) and inspect the plugin hooks to see if there is anything subscribed to the profile:fields hook.
Thanks a lot Jeff Tilson . I am really bad . I enabled profile plugin and was not knowing this ( not even looked at the plugins properly) . In profile plugin just imported all the default fields and It worked .
If there is any way to dispplay limited description if it has more then 300 characters and place read more button to display the full view? It s anoying if the description is very long and moves down all the videos, calendar etc.
Metadata can be assigned on any ElggEntity object. Here are the docs for metadata: http://docs.elgg.org/wiki/Engine/DataModel/Metadata
The event is to allow other plugins and core to react to someone changing their profile. Here's docs for that: http://docs.elgg.org/wiki/Events