As of February 1, 2010, PowerCenter 8.6.1 Hotfix10 is generally available. This includes both Standard and Advanced Editions (SE / AE) of PowerCenter. Customers who are currently in version 8.6.1 and previous hot fixes are strongly recommended to update to the latest maintenance patch release.
There are a number of bug fixes across all major components in PowerCenter 8.6.1. A comprehensive list of the fixes and known limitations in this service pack can be found in the release notes available in the documentation center at the Hotfix Download Center.