What ever people think Silverlight is dead or not, Microsoft is still keeping update Silverlight 5.
2012 May 8, Silverlight 5 was updated again. Pete Brown posted the news on his blog:
Silverlight 5.1.10411.0 Released Today
Pete Brown - 09 May 2012
Today we released a minor update to Silverlight 5. The 32 and 64 bit update version number is 5.1.10411.0. (The documentation said 5.2 at first, but this has been fixed.)
Get new Silverlight from Microsoft official site here.