"Failed to create looper" during call

What steps will reproduce the problem?

1. Install latest stable Firefox (16.x)
2. Install latest webrtc4all (1.11.745)
3. Checkout latest sipml5 (r121)
3. Start browser, configure credentials
4. Register
5. Try call some number

What is the expected output? What do you see instead?

Expected successful call. Instead the sipml5 hangs in "Call in progress" state 
with error message "Failed to create looper" in JS console

What version of the product are you using? On what operating system?

Firefox 16.0.1
webrtc4all 1.11.745
sipml5 r121
Windows 7 (64-bit)

Latest stable (22.x) Chrome, Safari and IE9 hangs in call in the same way, 
though IE do not shows error message in JS console. Opera do not work at all 
with w4a as seems like w4a mode is not detected by sipml5 code, so it shows 
alert asking for download w4a again. Seems like this is relate to 64-bit OS and 
w4a.

Can provide any additional information upon request.

Original issue reported on code.google.com by sfinx.so...@gmail.com on 6 Nov 2012 at 8:20

juniorlm87 / sipml5

"Failed to create looper" during call #52