Description of problem:
Running xfburn on fedora 22 32bit I tried to create new data compilation. Choosing file/s in 'File(s)to add to composition' dialog and clicking on Add button caused crash. I tried selecting both single and multiple files with the same result. However I succeeded to add the desired files when I dragged them from dialog to the composition tab in the xfburn main window and then closed the dialog.
The same result happend with all tried files some mp3's, zip, plain text.

Version-Release number of selected component:
xfburn-0.5.4-1.fc22

Additional info:
reporter:       libreport-2.6.0
backtrace_rating: 3
cmdline:        xfburn
crash_function: gtk_object_dispose
executable:     /usr/bin/xfburn
global_pid:     2127
kernel:         4.0.7-300.fc22.i686
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #3 gtk_object_dispose at /lib/libgtk-x11-2.0.so.0
 #4 gtk_widget_dispose at /lib/libgtk-x11-2.0.so.0
 #5 gtk_window_dispose at /lib/libgtk-x11-2.0.so.0
 #7 gtk_object_destroy at /lib/libgtk-x11-2.0.so.0
 #8 add_cb
 #9 g_cclosure_marshal_VOID__VOIDv at /lib/libgobject-2.0.so.0
 #10 _g_closure_invoke_va at /lib/libgobject-2.0.so.0
 #13 gtk_button_clicked at /lib/libgtk-x11-2.0.so.0
 #14 gtk_real_button_released.part at /lib/libgtk-x11-2.0.so.0
 #15 g_cclosure_marshal_VOID__VOIDv at /lib/libgobject-2.0.so.0