loadparm parameters and swat.c parameter filtering are messed up. The purpose of the "Basic", "Advanced" and "Developer" options in SWAT are designed to expose progressively more information for configuration. The current behaviour goes contra intent.
loadparm and SWAT have been cleaned up to restore intended behaviour.
originally reported against 3.0alpha23. Bugzilla spring cleaning.
sorry for the same, cleaning up the database to prevent unecessary reopens of bugs.