wpSearchMu is a very powerful search plugin for WordPress Mu. It is based on the open source search engine "Lucene" which means its fast and relevant.
wpSearchMu is known to react with certain plugins which manipulate search results. wpSearchMu must be installed /instead of/ wpSearch. Both plugins cannot be installed on the same blog. These plugins most likely expect the default WordPress search to in use, which it is not. The following plugins are known to cause issues:
Send all bug reports to firstname.lastname@example.org .