I'm having a problem with xfburn on slackware 13 64.It crashes when i add files to it.I have noticed that it works ok if i add a whole folder of mp3 or ogg but it crashes when trying to add files from different sources either through its add files dialogue or drag n drop from thunar.I can't figure it out at all.All dependencies have been met.When it works it great.Below is the messages I get.Thanks All.

xfburn
** Message: Using Thunar-VFS 1.0.1
** Message: Using HAL
** Message: Using gstreamer transcoder.
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/charline_arthur_welcome_to_the_club/01_burn_that_candle.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/charline_arthur_welcome_to_the_club/02_just_look,_don't_touch,_he's_mine.mp3
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/va-louisiana_hayride/disc_2/03-red_sovine-you're_barking_up_the_wrong_tree_now.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/va-louisiana_hayride/disc_2/04-paul_howard-the_boogie's_fine_tonight.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/va-louisiana_hayride/disc_2/07-billy_wallace-dog_hauled_around.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/va-louisiana_hayride/disc_2/08-oakie_jones-hillbilly_bessie.mp3
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/rev_gary_davis/have_more_faith_in_jesus.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/rev_gary_davis/i'm_gonna_meet_you_at_the_station.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/rev_gary_davis/i'm_throwing_up_my_hands.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/rev_gary_davis/i_am_the_true_vine_(1).mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/rev_gary_davis/i_belong_to_the_band-_hallelujah.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/rev_gary_davis/i_cannot_bear_my_burden_myself.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/rev_gary_davis/o_lord,_search_my_heart.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/rev_gary_davis/the_angel's_message_to_me.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/rev_gary_davis/the_great_change_in_me.mp3
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/bel-airs-origins_of_surf_music_1960-1963_[1987]-sundazed_1007/the_bel-airs-01-the_crawler~(_surf;_instrumental).mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/bel-airs-origins_of_surf_music_1960-1963_[1987]-sundazed_1007/the_bel-airs-02-stung~(_surf;_instrumental).mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/bel-airs-origins_of_surf_music_1960-1963_[1987]-sundazed_1007/the_bel-airs-03-peter_gunn~(_surf;_instrumental).mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/bel-airs-origins_of_surf_music_1960-1963_[1987]-sundazed_1007/the_bel-airs-05-mr.moto~(_surf;_instrumental).mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/bel-airs-origins_of_surf_music_1960-1963_[1987]-sundazed_1007/the_bel-airs-06-mr._moto_[''liberty''_session]~(_surf;_instrumental).mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/bel-airs-origins_of_surf_music_1960-1963_[1987]-sundazed_1007/the_bel-airs-07-little_brown_jug~(_surf;_instrumental).mp3
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/va-peepin_through_the_keyhole_vol_02/cd2/06_jolie_blond's_gone.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/va-peepin_through_the_keyhole_vol_02/cd2/07_jole_blond_(rock).mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/va-peepin_through_the_keyhole_vol_02/cd2/10_nouveau_grand_gueydan.mp3
** (xfburn:7239): DEBUG: adding uri path: /home/yojimbo/Downloads/music/va-peepin_through_the_keyhole_vol_02/cd2/11_jole_blond_(french).mp3
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
** Message: Signaled identification done: is audio
xfburn: pthread_mutex_lock.c:87: __pthread_mutex_lock: Assertion `mutex->__data.__owner == 0' failed.
Aborted

Its probably a problem with the application itself.
AFAIK xfburn is very immature yet.
I'd contact the developers of the application regarding any problems with it.

Are you using the latest xfburn, libburn, and libisofs? With xfburn-0.4.2, libburn-0.7.2, and libisofs-0.6.24, I've found it be a little more stable, not as stable as Graveman, but it's getting there.