Earlier this month, we released Visual Studio 2010 SP1. The service pack is available for download from here and the updated Report Viewer redistributable can be found here.
We always prioritize our efforts based on feedback we receive through Connect as well as through the forums and other channels. If you are running into problems with the product and believe you have encountered a bug, please file the issue at Connect so that we can investigate it. We review those issues regularly and adjust our priorities accordingly.
This service pack contains a number of important fixes to the viewer runtime and design time components. The list below is not an exhaustive list of fixes, but it does touch on the most common and visible issues that have been reported.