This may help debug:

[mvw]

Here is the vls -vvv output of a typical session: does this help?
Ciao,
Michael mvw at mvw.net


[root at ws-office michael]# vlc -vvv
VideoLAN Client - version 0.2.82 Ourumov - (C)1996-2001 VideoLAN

intf: playlist initialized
module: checking built-in modules
module: new builtin module `es', ISO 13818-1 MPEG Elementary Stream input
modulemodule: new builtin module `ps', ISO 13818-1 MPEG Program Stream
input module
module: new builtin module `ts', ISO 13818-1 MPEG Transport Stream input
module
module: new builtin module `yuv', YUV transformations module
module: new builtin module `idct', IDCT module
module: new builtin module `idctclassic', classic IDCT module
module: new builtin module `motion', motion compensation module
module: new builtin module `imdct', AC3 IMDCT module
module: new builtin module `downmix', AC3 downmix module
module: new builtin module `yuvmmx', MMX YUV transformations module
module: new builtin module `idctmmx', MMX IDCT module
module: new builtin module `motionmmx', MMX motion compensation module
module: new builtin module `idctmmxext', MMX EXT IDCT module
module: new builtin module `motionmmxext', MMX EXT motion compensation
module
module: new builtin module `imdct3dn', 3D Now! AC3 IMDCT module
module: new builtin module `imdctsse', SSE AC3 IMDCT module
module: new builtin module `downmix3dn', 3D Now! AC3 downmix module
module: new builtin module `downmixsse', SSE AC3 downmix module
module: new builtin module `dvd', DVD input module, linked with libdvdcss
module: new builtin module `dummy', dummy functions module
module: new builtin module `null', the Null module that does nothing
module: new builtin module `rc', remote control interface module
module: checking plugin modules
module: browsing `.'
module: browsing `plugins'
module: browsing `/usr/lib/videolan/vlc'
module: new plugin module `dsp', Linux OSS /dev/dsp module
module: new plugin module `gnome', Gnome interface module
module: new plugin module `gtk', Gtk+ interface module
module: new plugin module `x11', X11 module
module: new plugin module `xvideo', XVideo extension module

GnomeUI-WARNING **: While connecting to session manager:
Authentication Rejected, reason : None of the authentication protocols
specified are supported and host-based authentication failed.
module: module bank initialized
module: locking module `gnome'
intf: interface initialized
module: hiding unused plugin module `xvideo'
module: hiding unused plugin module `x11'
module: hiding unused plugin module `gtk'
module: hiding unused plugin module `dsp'
intf: added `dvd:/dev/dvd' to playlist
module: locking module `dvd'
dvd info: netlist initialized
ifo info: vmg initialized
dvd info: number of titles: 3
ifo info: vts 1 initialized
dvd: title 1 vts_title 1 pgc 1
module: locking module `motionmmxext'
module: locking module `idctmmxext'
module: locking module `downmix3dn'
module: locking module `imdct3dn'
vpar: no vout present, spawning one
vout: no suitable Xvideo image input port
vout: Xvideo not supported
module: locking module `x11'
vout info: asking for 720x576, 15/16 bpp (1440 Bpl)
intf info: menus refreshed as stream has changed
aout: no aout present, spawning one
module: locking module `dsp'
aout info: signed 16 bits stereo thread
vout: video display initialized (720x576, 16/16 bpp)
vout info: got 720x576, 16/16 bpp (1440 Bpl), masks: 0xf800/0x7e0/0x1f
module: locking module `yuvmmx'
aout info: audio output thread 9913 spawned
aout info: fifo #0 allocated, 2 channels, rate 0
vpar info: stream periodicity changed from B[1] to B[2]
vpar info: stream periodicity changed from P[5] to P[4]
vpar synchro warning: dts != current_pts (-232916)
vout: video display resized (529x399)
vout: unhandled event 22 received
vout: video display resized (321x256)
vout warning: late picture skipped (0x81c86a8)
vout warning: late picture skipped (0x81c85b8)
vout warning: late picture skipped (0x81c8658)
vout: video display resized (310x247)
vout: unhandled event 22 received
vout: video display resized (321x256)
vout: unhandled event 22 received
vout: video display resized (300x231)
vout: unhandled event 22 received
vout: video display resized (321x256)
vout: unhandled event 22 received
vout: video display resized (300x231)
vout: unhandled event 22 received
vout: video display resized (321x256)
vout: unhandled event 22 received
vout: unhandled event 22 received
vout: video display resized (321x256)
vout: video display resized (300x230)
vout: video display resized (301x228)
vout: video display resized (302x228)
pf_motion set to NULL
Bad address increment (-1)
Invalid motion_vector code
Bad address increment (-1)
DCT coeff (intra) is out of bounds
Invalid motion_vector code
module: hiding unused plugin module `xvideo'
DCT coeff (non-intra) is out of bounds
DCT coeff (intra) is out of bounds
Invalid motion_vector code
pf_motion set to NULL
Bad address increment (-1)
pf_motion set to NULL
pf_motion set to NULL
Bad address increment (-1)
Bad address increment (-1)
Bad motion vector (lum)
DCT coeff (non-intra) is out of bounds
Invalid motion_vector code
pf_motion set to NULL
Invalid motion_vector code
DCT coeff (intra) is out of bounds
Invalid motion_vector code
Invalid motion_vector code
Invalid motion_vector code
pf_motion set to NULL
DCT coeff (intra) is out of bounds
Invalid motion_vector code
DCT coeff (intra) is out of bounds
Bad motion vector (lum)
pf_motion set to NULL
Slices do not follow
Invalid motion_vector code
DCT coeff (intra) is out of bounds
Slices do not follow
Invalid motion_vector code
vout: unhandled event 22 received
Bad address increment (-1)
Bad motion vector (lum)
Bad address increment (-1)
Invalid motion_vector code
DCT coeff (intra) is out of bounds
pf_motion set to NULL
pf_motion set to NULL
Slices do not follow
Slices do not follow
Bad motion vector (lum)
Bad motion vector (lum)
Bad motion vector (lum)
Invalid motion_vector code
DCT coeff (intra) is out of bounds
Bad address increment (-1)
Bad address increment (-1)
Slices do not follow
pf_motion set to NULL
pf_motion set to NULL
Invalid motion_vector code
pf_motion set to NULL
Slices do not follow
Invalid motion_vector code
pf_motion set to NULL
pf_motion set to NULL
Bad address increment (-1)
Invalid motion_vector code
DCT coeff (intra) is out of bounds
DCT coeff (intra) is out of bounds
Bad motion vector (lum)
pf_motion set to NULL
DCT coeff (intra) is out of bounds
Invalid motion_vector code
Slices do not follow
pf_motion set to NULL
Slices do not follow
module: unlocking module `idctmmxext'
module: unlocking module `motionmmxext'
aout info: fifo #0 destroyed
module: unlocking module `downmix3dn'
module: unlocking module `imdct3dn'
module: unlocking module `dvd'
module: unlocking module `dsp'
module: unlocking module `yuvmmx'
module: unlocking module `x11'
module: unlocking module `gnome'
intf: removed `dvd:/dev/dvd' from playlist
intf: playlist destroyed
intf: program terminated
[root at ws-office michael]#