As previously announced, this release of GD Star Rating will be the ending of the current, and soon old 1.x branch. Development of GD Star Rating 2.0.0 is well underway, and until it is completed, there will be some bug fixing releases in the current stable branch.
This is stability mainly release, with some functions changes and several minor fixes and changes. Plugin is tested on WordPress 2.7, 2.8, 2.9 and it works fine on all 3 versions. Over the next 2 months or so, I plan to release 2-3 bug fixing and stability releases. But, the development focus is on GD Star Rating 2.0 that is planned for end of April 2010. Progress on that will follow.
More details on the official website:
GD Star Rating 1.8.0 MMX: http://dv4p.com/i5