Ran application I am working on no problems. The welcome application seems to pull in some adware. Firebug opens in Firefox with a problem loading sm6.html saying _gat is not defined. I believe this is coming from the Share item in the top menu.
The jQuery team has released 1.6.4 to fix a bug introduced in 1.6.3 which I have not seen yet, I believe it manifests on IE. The version in trunk is 1.6.3 still. Ron