Amber-Kaliningrad 404 in compat.js (with argument)

just to clarify, this is probably unrelated to this one [1].

I can load the Amber Browser (with Kaliningrad at /tools/amber-browser) just fine.

The problem is in my application itself. It's using the same amber loader but for some reason amber is asking the server for the file compat.js sending this argument ?_=1331202018517 (see screenshots).

Is that Amber's request well formed? What's the purpose of that argument?

BTW, when you examine the requests at /tools/amber-browser the request for compat.js is clean (no argument) and, as expected, the file is properly served

thanks for any help

sebastian

o/

PS: so far I'm developing by hacking kaliningrad's amber browser component so it also starts my app 

[1] https://groups.google.com/forum/?hl=pt&fromgroups#!topic/amber-lang/ud7tAv16Bk8