Next Cumulative Update (August 2012) can only be install with SP1 installed farms/server.

If you don’t install SP1 on your SharePoint 2010 farm yet ,  Please read the fallowing post
http://blogs.technet.com/b/stefan_gossner/archive/2012/07/11/is-sp1-installed-on-your-sharepoint-2010-farm.aspx

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