camorama hang when actiovating effects

Binary package hint: camorama

Description of the crash:
hang when enabling some effects

Steps to reproduce the crash:
1. open camorama
2. set maximum size of the video
3. activate laplace or mirror effect (possibly others)

Expected Results:
freeze

How often does this happen?
always

Additional Information:
the cam is an stv680 based webcam

Debugging Information:

Backtrace was generated from '/usr/bin/camorama'

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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1223702304 (LWP 7121)]
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0xffffe410 in __kernel_vsyscall ()
#0 0xffffe410 in __kernel_vsyscall ()
#1 0xb7534463 in __waitpid_nocancel ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2 0xb7f488e6 in libgnomeui_module_info_get ()
   from /usr/lib/libgnomeui-2.so.0
#3 <signal handler called>
#4 0x0804e1ee in ?? ()
#5 0xb5cfc008 in ?? ()
#6 0xb6c78000 in ?? ()
#7 0x0004a400 in ?? ()
#8 0xb755ef9f in g_source_get_current_time () from
/usr/lib/libglib-2.0.so.0
#9 0x0804ff7e in ?? ()
#10 0xb6c78000 in ?? ()
#11 0x00000160 in ?? ()
#12 0x00000120 in ?? ()
#13 0x00000003 in ?? ()
#14 0x08079170 in ?? ()
#15 0x083ba320 in ?? ()
#16 0x00000000 in ?? ()

Thread 1 (Thread -1223702304 (LWP 7121)):
#0 0xffffe410 in __kernel_vsyscall ()
No symbol table info available.
#1 0xb7534463 in __waitpid_nocancel ()
   from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#2 0xb7f488e6 in libgnomeui_module_info_get ()
   from /usr/lib/libgnomeui-2.so.0
No symbol table info available.
#3 <signal handler called>
No symbol table info available.
#4 0x0804e1ee in ?? ()
No symbol table info available.
#5 0xb5cfc008 in ?? ()
No symbol table info available.
#6 0xb6c78000 in ?? ()
No symbol table info available.
#7 0x0004a400 in ?? ()
No symbol table info available.
#8 0xb755ef9f in g_source_get_current_time () from
/usr/lib/libglib-2.0.so.0
No symbol table info available.
#9 0x0804ff7e in ?? ()
No symbol table info available.
#10 0xb6c78000 in ?? ()
No symbol table info available.
#11 0x00000160 in ?? ()
No symbol table info available.
#12 0x00000120 in ?? ()
No symbol table info available.
#13 0x00000003 in ?? ()
No symbol table info available.
#14 0x08079170 in ?? ()
No symbol table info available.
#15 0x083ba320 in ?? ()
No symbol table info available.
#16 0x00000000 in ?? ()
No symbol table info available.
#0 0xffffe410 in __kernel_vsyscall ()