Can Silverlight 4 and 5 plugins live side by side?

With SL plugin 5.0.60818.0 I get an error when I open this page: http://demos.telerik.com/silverlight/#Docking/FirstLook

(I hope someone from telerik sees this).

I uninstalled SL 5 and reinstalled SL 4, and the page opens fine.

Is there some way I can have both SL 4 and SL 5 runtimes installed, and just configure my browser to us开发者_JS百科e the one I want?

The SL4 and SL5 SDK's can live side-by-side, why not the plugins?

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Not on the same OS. You can create a Virtual Machine using Microsoft Virtual PC and use that for one of the plug-ins.