This post is more than 2 years old.
One of the shortcuts that Spry borrowed from prototype was this:
var someitem = $("idofitem");
In order to avoid conflicts with folks using Spry and Prototype or other frameworks, this syntax has been changed:
var someitem = Spry.$("idofitem");
I saw this in the release notes, but Peter noted how it had tripped him up so I thought I'd warn folks.