Trouble getting notebook to work

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I have just installed the 64 bit version of Sage for OSX... the app bundle. It works fine from command line but the notebook will not start. In my browser, it simply times out. Here is the log file that is generated:

Checking existance of notebook directory Starting Notebook Building Sage on OS X in 64-bit mode Creating SAGE_LOCAL/lib/sage-64.txt since it does not exist Detected SAGE64 flag

Building Sage on OS X in 64-bit mode

| Sage Version 4.7, Release Date: 2011-05-23 |

| Type notebook() for the GUI, and license() for information. |

Please wait while the Sage Notebook server starts... ... The notebook files are stored in: sage_notebook.sagenb Traceback (most recent call last): File "/tmp/sage-mac-app/local/bin/sage-notebook", line 36, in <module> notebook(port=8000) File "/tmp/sage-mac-app/devel/sagenb/sagenb/notebook/notebook_object.py", line 217, in __call__ return self.notebook(args, *kwds) File "/tmp/sage-mac-app/devel/sagenb/sagenb/notebook/run_notebook.py", line 443, in notebook_twisted port = find_next_available_port(interface, port, port_tries) File "/tmp/sage-mac-app/devel/sagenb/sagenb/misc/misc.py", line 118, in find_next_available_port s.connect((interface, port)) File "/tmp/sage-mac-app/local/lib/python2.6/site-packages/sage/misc/misc.py", line 1871, in __mysig raise KeyboardInterrupt, "computation timed out because alarm was set for %s seconds"%__alarm_time KeyboardInterrupt: computation timed out because alarm was set for 1 seconds

Any suggestions as to how to get it working?

Thanks in advance.