Markup Causes Beaming Problem

[Jonathan Wilkes]

Hello,
     I think Lilypond is being a weirdo.

The second beam looks messed up to me (winxp sp3), but when I remove 
the _"x" markup, the \p, or the slur in the treble clef, it clears up.

Is this bug #430?

Also, what's the best way to make that slur in the bass clef look nice? 
It seems to be colliding with the accent mark and with the bottom of one 
of the natural signs.  Any insight would be appreciated.

-Jonathan

Code Below:

\version "2.12.2"

rhStaff = { \change Staff = "RH" }
lhStaff =  { \change Staff = "LH" }

sb = { 
        \once \set subdivideBeams = ##t
        \once \set beatLength = #(ly:make-moment 1 8)
}

\relative c''' {
        \time 3/4
        <<
        \new Staff = "RH" {
                                r32 \sb cis[(\p d, ais' gis c,_"x" a ees]
                                \stemDown b'[ fis cis \lhStaff \clef bass 
\stemUp e, <bes a'> \rhStaff \stemDown <c'' d>-.) r \lhStaff \stemUp <cis,, 
dis>]->( \stemNeutral <c,! d!>8..)\sustainOn \rhStaff <fis'' ees' f! d' 
fis>32-. |
        }
        \new Staff = "LH" { s2. }
        >>
}