Thread:Extension talk:Semantic MediaWiki/Upgrading SMW old version/reply

Oh, this is quite an archaic installation. Hmm, did you completely rebuild your store and data (or upgrading to 1.8.x)? Perhaps you are still using the " " syntax for annotating properties. I think this does not longer work in recent versions. The best way to ask questions about SMW is to use the Semantic MediaWiki mailing lists.