UnicodeDecodeError at /settings/FORUM_DATA_RULES/

bug
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When I try to enter FORUM_DATA_RULES, I get error:

UnicodeDecodeError at /settings/FORUM_DATA_RULES/
'ascii' codec can't decode byte 0xd0 in position 0: ordinal not in range(128)
Request Method: GET
Request URL:    http://127.0.0.1:8000/settings/FORUM_DATA_RULES/
Django Version: 1.4.5
Exception Type: UnicodeDecodeError
Exception Value:    
'ascii' codec can't decode byte 0xd0 in position 0: ordinal not in range(128)
Exception Location: /Users/bluebyte/Documents/source/askbotdevel/askbot/deps/livesettings/values.py in _default_text, line 250

Who knows how to fix that?