Poor Floating DockPane performance in Chrome, Firefox

[Bill]

I have developed a test application for my company using the RadDocking.  I am noticing dramatically different floating DockPane performance between IE and Chrome/Firefox.  I can fluidly drag the DockPane around in IE, but in Chrome and Firefox, there is unacceptable lag and choppiness.  I can see this same behavior, to a lesser extent, on http://demos.telerik.com/silverlight/#Docking/FirstLook.

Silverlight Version: 4.0.50917.0 
IE Version: 8.0.7600.16385
Chrome Version: 8.0.552.237
Firefox Version: 3.6.10

Is it reasonable to expect vastly different performance of Silverlight across browsers?  [An interesting side note; in BubbleMark (with 16 balls - http://bubblemark.com/sl3/TestPage.html), I get ~185 fps in IE and FF, yet ~280 fps in Chrome.]  Any suggestions for mitigating this issue?

[George]

Hello Bill,

 

We will greatly appreciate a demo that reproduces the problem with RadDocking control in different browsers. It will definitely help us in further pinpointing and resolving the problem. Can you attach the demo to this thread? 

Greetings,
George
the Telerik team