Here is an example that Sebastien Richard gave in another bug report: http://www.exalead.com/search/web/results/?q=%2Fjenn.%2A%2F This search gives 0 results (as a comparison "jenn" returns 2 million hits and "jennifer" returns 29 millions) Note that fixing regexp search is all the more important since prefix search doesn't work either. 347067 515959