sane access for non-root user

[Richard Lyons <richard@the-place.net>]

I've just spent over an hour googling in vain.  And I am sure I should
know the answer to this...

New sid install (on a not-new Dell Inspiron 8200 FWIW).  Installed xsane
and can only access it as root.  Added myself to scanner group, but
still xsane finds 'no devices available' as ordinary user.  Can someone
remind me or point me at the relevant instructions.  

uname -r says 2.6.12-1-386. udevd is running -- I suppose that is
obvious as the scanner works for root.  What else is important?

TIA

-- 
richard