GD Rating System Pro 2.0.6 is a very important bug fixing release, focused on the rare case of database switching and problems with deletion of blogs in the multisite network environment.
If your website was using blog switching functions in a multisite environment, GD Rating System was not properly switching names of its tables, causing problems with some queries. Same thing was happening if you delete the blog in the network, and you might end up removing rating tables for the main blog. So far, no one reported this as an issue, but it is important to have this fixed to avoid any potential problems.
If you find any more problems, please stop by the forums to report them.
Next major version 2.1 will be released next week. This version is mostly a maintenance release that updates on many aspects of the plugin and adding few smaller new features.