New OSQA Installation on WebFaction: 500 Internal Server Error

I'm doing a new OSQA installation on WebFaction (using the OSQA Install Script) and I'm getting the following error when I browse to the URL:

500 Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, [no address given] and inform them of the time the error occurred, and anything you might have done that may have caused the error. More information about this error may be available in the server error log.

I've had a look at the Apache logs,

[Wed Apr 13 10:32:08 2011] [warn] mod_wsgi: Compiled for Python/2.6.
[Wed Apr 13 10:32:08 2011] [warn] mod_wsgi: Runtime using Python/2.6.5.
[Wed Apr 13 10:32:08 2011] [notice] Apache/2.2.15 (Unix) mod_wsgi/3.2 Python/2.6.5 configured -- resuming normal operations
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1] mod_wsgi (pid=29403): Exception occurred processing WSGI script '/home/merspi/webapps/osqa/osqa.wsgi'.
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1] Traceback (most recent call last):
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/lib/python2.6/django/core/handlers/wsgi.py", line 230, in __call__
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     self.load_middleware()
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/lib/python2.6/django/core/handlers/base.py", line 40, in load_middleware
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     mod = import_module(mw_module)
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/lib/python2.6/django/utils/importlib.py", line 35, in import_module
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     __import__(name)
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/osqa/forum/middleware/extended_user.py", line 4, in <module>
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     from forum.views.auth import forward_suspended_user
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/osqa/forum/views/__init__.py", line 5, in <module>
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     import meta
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/osqa/forum/views/meta.py", line 17, in <module>
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     from forum.badges.base import BadgesMeta
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/osqa/forum/badges/__init__.py", line 5, in <module>
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     from base import BadgesMeta
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/osqa/forum/badges/base.py", line 12, in <module>
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     installed = dict([(b.cls, b) for b in Badge.objects.all()])
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/lib/python2.6/django/db/models/query.py", line 105, in _result_iter
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     self._fill_cache()
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/lib/python2.6/django/db/models/query.py", line 777, in _fill_cache
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     self._result_cache.append(self._iter.next())
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/lib/python2.6/django/db/models/query.py", line 271, in iterator
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     for row in compiler.results_iter():
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/lib/python2.6/django/db/models/sql/compiler.py", line 677, in results_iter
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     for rows in self.execute_sql(MULTI):
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/lib/python2.6/django/db/models/sql/compiler.py", line 732, in execute_sql
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     cursor.execute(sql, params)
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/lib/python2.6/django/db/backends/util.py", line 15, in execute
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     return self.cursor.execute(sql, params)
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]   File "/home/merspi/webapps/osqa/lib/python2.6/django/db/backends/postgresql_psycopg2/base.py", line 44, in execute
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1]     return self.cursor.execute(query, args)
[Wed Apr 13 11:32:43 2011] [error] [client 127.0.0.1] DatabaseError: current transaction is aborted, commands ignored until end of transaction block

It would appear that there's some database issue but the password is correct in settings_local.py. The really strange thing is that - it was working a few hours ago but I deleted the server and started over (repeating the same steps) and now it's spitting out this error message!

Apache port is correct in settings_local.py ('listen' in httpd.conf) - I don't know what else to check?

PostgreSQL database is working - settings are correct. I can access it via phpPgAdmin so I assume it must be OK.

Any ideas? What am I missing here?

Many thanks in advance.