Just a quick note to make sure that anyone typing this error message into a search engine will find this post.
Due to a change in the SharePoint 2010 AllDocVersions table it is no longer possible to rebuild indexes as part of a SQL 2008 maintenance plan and keep the indexes on-line at the same time.
The reason behind this is that the MetaInfo field is no longer of type Image. It is now of type tCompressedBinary:varbinary(MAX).
If you get the error listed below then make sure you open the Rebuild Index Task in your SQL Maintenance plan and disable the ‘Keep index online while reindexing’ option.