Hi Maxim!

Your solution worked. Thanks for the fast response.

I was able to access the original params through the $_SERVER['REQUEST_URI'] php array as you said. I didn't even have to change my conf.

God bless you. I spent the better part of the last 24 hours trying to figure this one out.
I should have paid closer attention to my nginx error.log... the answer was right there in front of me ;)

[debug] 15544#0: *15 fastcgi param: "REQUEST_URI: /content/file3.zip?psk=abracadabra"