There are at least two similar error reports i found:
http://dev.deluge-torrent.org/ticket/756
viewtopic.php?f=7&t=11135
It's looks like it is pretty much the same problem. I have it too, despite downloading the latest version.
--Deluge Error--
ExpatError : not well-formed (invalid token): line 370, column 74
path : /index
file : /usr/lib/python2.6/site-packages/deluge-1.1.7-py2.6-linux-i686.egg/deluge/xmlrpclib.py in feed, line 546
--Input--
<Storage {}>
--Versions--
WebUi : 1.1.7r
Python 2.6.2 (r262:71600, May 4 2009, 16:45:20)
[GCC 4.1.1 (Gentoo 4.1.1-r1)]:
[...]
File "/usr/lib/python2.6/site-packages/deluge-1.1.7-py2.6-linux-i686.egg/deluge/xmlrpclib.py", line 1338, in _parse_response
p.feed(response)
File "/usr/lib/python2.6/site-packages/deluge-1.1.7-py2.6-linux-i686.egg/deluge/xmlrpclib.py", line 547, in feed
self._parser.Parse(data, 0)
deluged says nothing when i try to refresh the page, however earlier (after adding latest .torrent, i guess), there was something like:
[DEBUG ] 10:37:35 torrent:800 Saving fastresume file: /home/iso-dl/.config/deluge/state/0f8f3828d845122fe5c0f7500826ed8e24af24b4.fastresume
Traceback (most recent call last):
File "/usr/lib/python2.6/logging/__init__.py", line 773, in emit
stream.write(fs % msg.encode("UTF-8"))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xb3 in position 191: ordinal not in range(128)