Adobe released an update to the FLVPlayback component (v22.214.171.124) for Flash CS4 and Flex 3.
Excerpt from Kevin’s blog. Go there for more detailed information
Today(22-may-09) we released two free tools; the new DVRCast application for Flash Media Interactive Server 3.5, and an update to FLVPlayback component. You can find them both on the Flash Media Server productivity tools page: http://www.adobe.com/go/fms_tools/. You can read more from a new article from David Hassoun posted here: http://www.adobe.com/devnet/flashmediaserver/articles/live_dvr_pt2.html
DVRCast uses existing technology built into the server, DVRCast extends the server functionality with abilities to manage metadata, start and stop and scheduling of DVR-enabled streams.
Adobe has updated the component to support DVR functionality. We now support this component in both Flash Professional CS4 and the Flex SDK. The current version is FLVPlayback 126.96.36.199, and is included in the DVRCast download. You can also download it separately.