--- a/tools/assistant/lib/qhelpsearchindexwriter_clucene.cpp	Fri Apr 16 15:50:13 2010 +0300
+++ b/tools/assistant/lib/qhelpsearchindexwriter_clucene.cpp	Mon May 03 13:17:34 2010 +0300
@@ -585,7 +585,7 @@
     this->m_indexFilesFolder = indexFilesFolder;
     mutex.unlock();
 
-    start(QThread::NormalPriority);
+    start(QThread::LowestPriority);
 }
 
 void QHelpSearchIndexWriter::optimizeIndex()