lokal notebook server does not start any more (GLib-CRITICAL)

edit

Dear all,

My laptop crashed yesterday (newest Ubuntu) while running the notebook and now every time I try to start the notebook server using "./sage -notebook" I get the following failure:

user@laptop:~/Programs/sage-upgrade$ ./sage -notebook
??????????????????????????????????????????????????????????????????????
? Sage Version 5.12, Release Date: 2013-10-07                        ?
? Type "notebook()" for the browser-based notebook interface.        ?
? Type "help()" for help.                                            ?
??????????????????????????????????????????????????????????????????????

Please wait while the Sage Notebook server starts...
The notebook files are stored in: sage_notebook.sagenb
Another Sage Notebook server is running, PID 2553.
Opening web browser at http://localhost:8080/ ...

(process:2881): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
user@laptop:~/Programs/sage-upgrade$

Does anyone have an idea how to solve this? Thank you!