Cache is enable in you Site Collection? try disable<o:p></o:p>
One time i had to do the bellow procedure, was the only thing that solved my problem.<o:p></o:p>
Can you Reset the crawl and start a full crawl from
scratch? BE CAREFULL if you are in Production, use at your own risk<o:p></o:p>
MVP Office Development, MCP, MCTS SharePoint 2010 Development