I added some functionality into the standard client that might allow me to debug this.
If any of you who have this problem use the latest default client, you can use the console command ":cscript js 2048" to make the client connect to me so that I can run commands directly to debug the problem. This, of course, implies that you trust me with unimpeded access to your computer (which, of course, you do anyway since you run my program, though).
(Of course, I have to be by the computer at the time to be able to respond, also.)