The following exception is thrown when the livesearch contains spaces:

It is probably due to a space character followed by the * in the query string when the request is send to the server.

2006-04-19 00:56:02,748 WARN [confluence.search.actions.SearchQueryBean] buildQueryNoSpaceLimit Unable to build search query: Couldn't parse the query successfully:Lexical error at line 1, column 9. Encountered: <EOF> after : ""
bucket.search.lucene.LuceneException: Couldn't parse the query successfully:Lexical error at line 1, column 9. Encountered: <EOF> after : ""
at bucket.search.lucene.LuceneSearcher.buildStandardQuery(LuceneSearcher.java:67)
at com.atlassian.confluence.search.searchers.TextSearch.addDefaultTextFields(TextSearch.java:55)
at com.atlassian.confluence.search.searchers.TextSearch.restrictQuery(TextSearch.java:27)
at com.atlassian.confluence.search.actions.SearchQueryBean.addSearchTerms(SearchQueryBean.java:202)
at com.atlassian.confluence.search.actions.SearchQueryBean.buildQueryNoSpaceLimit(SearchQueryBean.java:103)
at com.atlassian.confluence.search.actions.SearchQueryBean.buildQuery(SearchQueryBean.java:89)