Trouble with mtgox's withdraw bitcoins api call
The problem I was having had to do with formatting. In the api documentation there is an amount_int param which needs to be passed with the http request. I had forgotten that mtgox requires anything with _int postfixing to be in the form amount * 10 ^ 8

so for example if you were trying to send 0.01 bitcoins for the amount_int field you would put

0.01 * 10 ^ 8 = 1000000