livesearch returns no results for complete words - only part words

If you type in a livesearch box, say looking for the word "source" as you complete the word the potential hit list goes to zero.

For an example see a test page I've set up

http://confluence.atlassian.com/display/TEST/LiveSearch+test

with the simple macro

( Note the space has to be ds not TEST as another bug stops non-lower case spaces working ).

Just type 'source' in the box and watch what happens to the hit list.

This is not what the user will expect and seriously undermines the usefulness of this feature - the expected behaviour is to see all the pages with the word source in them!