[Avodah] Changing the tune in Lecha Dodi - Revisted

[Micha Berger]

On Sat, Dec 25, 2010 at 06:36:08PM +0200, Ben Waxman wrote:
> Of course it depends how someone defines what is a source. If some rebbi  
> from 19th century makes some hiddush, is that a source?

If his chiddush gives a motive for the new practice, why not?

I was thinking that a minhag with no source is something people just
started doing for no particular Torah motive.

Tir'u baTov!
-Micha