Thread:Project:Support desk/Can`t edit preferences/reply (10)

You're right: In the default configuration, it is not $wgGroupPermissions['user']['editmyoptions'], but $wgGroupPermissions['*']['editmyoptions'], which is set to true. I guess your problem happens when you overwrite the complete $wgGroupPermissions['user'] or even the complete $wgGroupPermissions array.

Instead, you should only change those keys, which you really want to have changed and not overwrite all.