bug in tablature chords support in lilypond (GNU LilyPond) 2.1.0

[Stef Epardaud]

Hello,

I've upgraded from 1.6 to 2.1 (debian package) and I can honestly say
there's been a huge number of improvements, so first things first,
congratulations for all these!
Now my bug:
It used to be the case that chords '<>' were just simultaneous music in
lilypond 1.6, now I understand chords are special, in the sense that
they share the time duration at the end of the '<>' construct, and can
be linked to other notes or chords by '~' for example. The problem is
that \x notation for tablature indicating the string at which the note
is played is not interpreted in the '<>' construct anymore, which leads
to auto-interpretation of the string used (which in most cases is not
good enough).
The only solution to have correct strings specified is to use the '<<>>'
syntax, with note durations inside on each note played, but this does
not let me link the chord to the next one using '~' !!
So I can either link my chords with wrong tablature (string numbers), or
have correct chords but unspecifiable durations (no '~'), I really thing
this is a bug, or is there some new syntax ?
And is <<>> really meant to be used for guitar chords ? (I'd like that
to be no ;)

Thanks for the help!
-- 
Stéphane Epardaud