#0  0xb7afd24c in IA__gdk_window_set_opacity (window=0x61706573, opacity=0.5)
#1  0xb7f5a96c in fadeout_callback (fadeout=0x83951d8) at libgksu.c:321
  [Error: libgksu.c was not found in source tree]
#2  0xb78ef1e1 in g_idle_dispatch (source=0x8393568, callback=0x806bcd0, 
#3  0xb78f0d96 in IA__g_main_context_dispatch (context=0x8070c60)
#4  0xb78f4153 in g_main_context_iterate (context=0x8070c60, block=1, 
#5  0xb78f4537 in IA__g_main_loop_run (loop=0x8198598)
#6  0xb7bf04d9 in IA__gtk_dialog_run (dialog=0x839b838)
#7  0xb7f5ae1f in report_failed_grab (what=FAILED_GRAB_MOUSE) at libgksu.c:631
  [Error: libgksu.c was not found in source tree]
#8  0xb7f5b136 in grab_keyboard_and_mouse (dialog=0x809c940) at libgksu.c:677
  [Error: libgksu.c was not found in source tree]
#9  0xb7f5b655 in su_ask_password (context=0x8071cf0, 
#10 0xb7f57e75 in gksu_sudo_full (context=0x8071cf0, 
#11 0xb7f59f57 in gksu_run_full (context=0x8071cf0, ask_pass=0, 
#12 0x0804baf8 in main (argc=13, argv=) at gksu.c:822
#13 0xb7763450 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#14 0x0804a3e1 in _start ()