Deluge webUI don't save some preferences

[simonbcn]

deluged + deluge-web in server.

I connect remotely and I try to config via webUI, but it don't save: Incoming/Outgoing Ports, Global Bandwidth Usage/Maximum Connections and other options.
Sometimes it saves the options but it return to defaults later, in this cases it shows this output:

Traceback (most recent call last):
  File "/usr/local/lib/python2.6/dist-packages/deluge-1.3.1-py2.6.egg/deluge/main.py", line 214, in start_daemon
    Daemon(options, args)
  File "/usr/local/lib/python2.6/dist-packages/deluge-1.3.1-py2.6.egg/deluge/core/daemon.py", line 171, in __init__
    reactor.run()
  File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py", line 1170, in run
    self.mainLoop()
  File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py", line 1179, in mainLoop
    self.runUntilCurrent()
--- <exception caught here> ---
  File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py", line 778, in runUntilCurrent
    call.func(*call.args, **call.kw)
  File "/usr/local/lib/python2.6/dist-packages/deluge-1.3.1-py2.6.egg/deluge/core/preferencesmanager.py", line 467, in _on_new_release_check
    self.new_release_timer.stop()
  File "/usr/lib/python2.6/dist-packages/twisted/internet/task.py", line 171, in stop
    assert self.running, ("Tried to stop a LoopingCall that was "
exceptions.AssertionError: Tried to stop a LoopingCall that was not running.

[Calum]

See #1370