New API response format?

[kresu]

Did something change today wih btc-e API?

My script is throwing an error trying to parse 'return' string from json response.
It started to happen about 9:00 GMT.

json['return']['funds']['btc'])
->
KeyError: 'return'

Does anybody know if some new format of the response was implemented today on btc-e?

EDIT:
After some debugging I noticed that the error is in fact "invalid nonce parameter;". But I didn't change anything in the code.