I have the same problem, but i've got another Audacious version - 2.2.0
When I move crossfader to the beginning of the song then Audacious freezes but music is playing.
Then only thing I can do is kill the process and start again.
But in your case Aud freezes when you change to less than 16 seconds - in my ONLY when I try to start from first second.


I ran Audacius by terminal and that appeared when started to play a song:
"madplug: lost synchronization." - mayby it will be helpful.

System: Ubuntu 9.10
Audacious: 2.2.0 [ from http://audacious-media-player.org/ ]
Audacious-plugins: 2.2.0 [ above ]


LSMOD:

aes_i586                7260  0 
aes_generic            26791  1 aes_i586
binfmt_misc             6201  1 
radeon                526248  2 
ttm                    35266  1 radeon
drm_kms_helper         26637  1 radeon
drm                   151995  5 radeon,ttm,drm_kms_helper
i2c_algo_bit            4684  1 radeon
cfbcopyarea             3041  1 radeon
cfbimgblt               2101  1 radeon
cfbfillrect             3149  1 radeon
snd_hda_codec_analog    57450  1 
arc4                    1113  2 
snd_hda_intel          20264  2 
snd_hda_codec          69014  2 snd_hda_codec_analog,snd_hda_intel
iwl3945                60031  0 
snd_hwdep               5148  1 snd_hda_codec
iwlcore                99600  1 iwl3945
snd_pcm                67694  3 snd_hda_intel,snd_hda_codec
snd_timer              18303  1 snd_pcm
hp_accel               11040  0 
mac80211              126953  2 iwl3945,iwlcore
lis3lv02d               5871  1 hp_accel
snd                    52124  9 snd_hda_codec_analog,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
input_polldev           2442  1 lis3lv02d
cfg80211              116744  3 iwl3945,iwlcore,mac80211
serio_raw               3812  0 
soundcore               6364  1 snd
led_class               2760  1 hp_accel
snd_page_alloc          6972  2 snd_hda_intel,snd_pcm
video                  15958  0 
intel_agp              23217  0 
output                  1799  1 video
agpgart                30493  3 ttm,drm,intel_agp
tg3                   102638  0 



LSPCI:

00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express PCI Express Root Port (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
00:1f.2 SATA controller: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA AHCI Controller (rev 01)
01:00.0 VGA compatible controller: ATI Technologies Inc M52 [Mobility Radeon X1300]
02:06.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller
02:06.4 Communication controller: Texas Instruments PCIxx12 GemCore based SmartCard controller
08:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5753M Gigabit Ethernet PCI Express (rev 21)
10:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)