A cumulative update for Master Data Services has been released. It addresses a number (30+) of issues that weren't addressed before the release of SQL Server 2008 R2 RTM release. If you are looking at using MDS, then this update is a MUST for you. It also fixes the issue of publishing business rules which I blogged about earlier, so you no longer need that account to be part of sysadmin.
Below is the location of the knowledge base article that contains the list of fixes in this update and also the location of it:
Note: This is a full installation msi. You can install this MSI on a new server or an existing server that runs the RTM version of Master Data Services. If you apply this to an existing server, you will need to update your MDS database by using Master Data Services Configuration Manager after you install the MSI. Open Configuration Manager, and click Upgrade Database to do this.
Master Data Services is a feature of the versions and editions of SQL Server listed in Setup Requirements (Master Data Services). Any computer where you install Master Data Services must be licensed accordingly. For more information, refer to the End User License Agreement (EULA).