I am having a problem with Thinking sphinx on webfaction -- I have no probelem when I do it locally on osx.
I search
>> ThinkingSphinx.search \'raymond\
Are you using AwesomePrint by any chance?
I am and that is what was causing my problem.
You can see the bug report here:
https://github.com/freelancing-god/thinking-sphinx/issues/257
If you have not already, you should run rake ts:index
If you would like your search to update every time you make a change, I would suggest looking into Delta Indexes also.