I'm curious if any progress has been made on isolating whatever isn't thread safe about handlebars template execution.
I'm also working on using Handlebars.js inside nashorn however i'm doing a number of things different. i'm precompiling my templates using https://github.com/gruntjs/grunt-contrib-handlebars and then compile the js functions into cached bytecode. I haven't checked for threading issues yet but I'm glad i found this discussion so i know that i should.
