Confirmation :

$ skencil

*** glibc detected *** /usr/bin/python: free(): invalid pointer: 0xb7dcce18 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb7e747cd]
/lib/tls/i686/cmov/libc.so.6(cfree+0x90)[0xb7e77e30]
/usr/lib/skencil/Sketch/../Lib/paxmodule.so[0xb7afb984]
/usr/bin/python[0x8110e6a]
/usr/bin/python(PyEval_EvalFrameEx+0x6150)[0x80c8f80]
/usr/bin/python(PyEval_EvalFrameEx+0x6135)[0x80c8f65]
/usr/bin/python(PyEval_EvalFrameEx+0x6135)[0x80c8f65]
/usr/bin/python(PyEval_EvalCodeEx+0x775)[0x80c9d65]
/usr/bin/python(PyEval_EvalFrameEx+0x53f9)[0x80c8229]
/usr/bin/python(PyEval_EvalCodeEx+0x775)[0x80c9d65]
/usr/bin/python[0x8112096]
/usr/bin/python(PyObject_Call+0x27)[0x805c787]
/usr/bin/python[0x80628e4]
/usr/bin/python(PyObject_Call+0x27)[0x805c787]
/usr/bin/python(PyEval_EvalFrameEx+0x2031)[0x80c4e61]
/usr/bin/python(PyEval_EvalCodeEx+0x775)[0x80c9d65]
/usr/bin/python[0x8112096]
/usr/bin/python(PyObject_Call+0x27)[0x805c787]
/usr/bin/python[0x80628e4]
/usr/bin/python(PyObject_Call+0x27)[0x805c787]
/usr/bin/python(PyEval_CallObjectWithKeywords+0x6c)[0x80c1f7c]
/usr/bin/python(PyInstance_New+0x71)[0x8066031]
/usr/bin/python(PyObject_Call+0x27)[0x805c787]
/usr/bin/python(PyEval_EvalFrameEx+0x2031)[0x80c4e61]
/usr/bin/python(PyEval_EvalFrameEx+0x6135)[0x80c8f65]
/usr/bin/python(PyEval_EvalCodeEx+0x775)[0x80c9d65]
/usr/bin/python(PyEval_EvalCode+0x57)[0x80c9dd7]
/usr/bin/python(PyRun_FileExFlags+0xf8)[0x80e91d8]
/usr/bin/python(PyRun_SimpleFileExFlags+0x187)[0x80e9467]
/usr/bin/python(Py_Main+0x9c0)[0x8059330]
/usr/bin/python(main+0x22)[0x8058862]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xdc)[0xb7e22ebc]
/usr/bin/python[0x80587b1]
======= Memory map: ========
08048000-0813f000 r-xp 00000000 03:41 754480     /usr/bin/python2.5
0813f000-08164000 rw-p 000f6000 03:41 754480     /usr/bin/python2.5
08164000-084a2000 rw-p 08164000 00:00 0          [heap]
b6e00000-b6e21000 rw-p b6e00000 00:00 0 
b6e21000-b6f00000 ---p b6e21000 00:00 0 
b6f4f000-b6f5a000 r-xp 00000000 03:41 4980977    /lib/libgcc_s.so.1
b6f5a000-b6f5b000 rw-p 0000a000 03:41 4980977    /lib/libgcc_s.so.1
b6f6b000-b6f6d000 r-xp 00000000 03:41 1884368    /usr/lib/python2.5/lib-dynload/fcntl.so
b6f6d000-b6f6e000 rw-p 00002000 03:41 1884368    /usr/lib/python2.5/lib-dynload/fcntl.so
b6f6e000-b6f70000 r-xp 00000000 03:41 1884287    /usr/lib/python2.5/lib-dynload/_random.so
b6f70000-b6f71000 rw-p 00002000 03:41 1884287    /usr/lib/python2.5/lib-dynload/_random.so
b6f71000-b6f75000 r-xp 00000000 03:41 1884367    /usr/lib/python2.5/lib-dynload/binascii.so
b6f75000-b6f76000 rw-p 00003000 03:41 1884367    /usr/lib/python2.5/lib-dynload/binascii.so
b6f76000-b6f77000 ---p b6f76000 00:00 0 
b6f77000-b7777000 rw-p b6f77000 00:00 0 
b7777000-b777d000 r-xp 00000000 03:41 2361282    /usr/lib/skencil/Lib/paxtkinter.so
b777d000-b777e000 rw-p 00005000 03:41 2361282    /usr/lib/skencil/Lib/paxtkinter.so
b777e000-b7781000 r-xp 00000000 03:41 2361029    /usr/lib/skencil/Sketch/Modules/pstokenize.so
b7781000-b7782000 rw-p 00002000 03:41 2361029    /usr/lib/skencil/Sketch/Modules/pstokenize.so
b7782000-b7783000 r-xp 00000000 03:41 2361027    /usr/lib/skencil/Sketch/Modules/_type1module.so
b7783000-b7784000 rw-p 00000000 03:41 2361027    /usr/lib/skencil/Sketch/Modules/_type1module.so
b7784000-b778a000 r-xp 00000000 03:41 2361285    /usr/lib/skencil/Lib/streamfilter.so
b778a000-b778b000 rw-p 00005000 03:41 2361285    /usr/lib/skencil/Lib/streamfilter.so
b778b000-b77cc000 rw-p b778b000 00:00 0 
b77cc000-b77cf000 r-xp 00000000 03:41 1884451    /usr/lib/python2.5/lib-dynload/time.so
b77cf000-b77d1000 rw-p 00002000 03:41 1884451    /usr/lib/python2.5/lib-dynload/time.so
b77d1000-b78b4000 rw-p b77d1000 00:00 0 
b78b4000-b78b5000 r-xp 00000000 03:41 2097642    /usr/lib/gconv/ISO8859-1.so
b78b5000-b78b7000 rw-p 00000000 03:41 2097642    /usr/lib/gconv/ISO8859-1.so
b78b7000-b78c0000 r--p 00000000 03:41 2361264    /usr/lib/skencil/Resources/Messages/fr/LC_MESSAGES/skencil.mo
b78c0000-b78d3000 r-xp 00000000 03:41 756284     /usr/lib/libz.so.1.2.3
b78d3000-b78d4000 rw-p 00012000 03:41 756284     /usr/lib/libz.so.1.2.3
b78d4000-b78f2000 r-xp 00000000 03:41 761784     /usr/lib/libjpeg.so.62.0.0
b78f2000-b78f3000 rw-p 0001d000 03:41 761784     /usr/lib/libjpeg.so.62.0.0
b78f3000-b7925000 r-xp 00000000 03:41 1950707    /usr/lib/python2.5/site-packages/PIL/_imaging.so
b7925000-b7928000 rw-p 00032000 03:41 1950707    /usr/lib/python2.5/site-packages/PIL/_imaging.so
b7928000-b7930000 rw-p b7928000 00:00 0 
b7930000-b794c000 r--p 00000000 03:41 1081808    /usr/share/locale-langpack/fr/LC_MESSAGES/libc.mo
b794c000-b7959000 r-xp 00000000 03:41 756981     /usr/lib/libXext.so.6.4.0
b7959000-b795a000 rw-p 0000d000 03:41 756981     /usr/lib/libXext.so.6.4.0
b795a000-b7a09000 r-xp 00000000 03:41 756108     /usr/lib/libtcl8.4.so.0
b7a09000-b7a0f000 rw-p 000af000 03:41 756108     /usr/lib/libtcl8.4.so.0
b7a0f000-b7ae2000 r-xp 00000000 03:41 756460     /usr/lib/libtk8.4.so.0
b7ae2000-b7aee000 rw-p 000d3000 03:41 756460     /usr/lib/libtk8.4.so.0
b7aee000-b7aff000 r-xp 00000000 03:41 2361281    /usr/lib/skencil/Lib/paxmodule.so
b7aff000-b7b01000 rw-p 00010000 03:41 2361281    /usr/lib/skencil/Lib/paxmodule.so
b7b01000-b7b05000 r-xp 00000000 03:41 756969     /usr/lib/libXdmcp.so.6.0.0
b7b05000-b7b06000 rw-p 00003000 03:41 756969     /usr/lib/libXdmcp.so.6.0.0
b7b06000-b7b08000 r-xp 00000000 03:41 756966     /usr/lib/libXau.so.6.0.0
b7b08000-b7b090Abandon (core dumped)