I am using Heroku with a Ruby on Rails application, and running from Safari. I have the following Ajax call:

$.ajax({
    type : 'POST',
    url : '/test_page',
    data : {stuff: arr1},
    dataType : 'script'
});

arr1 is supposed to be an array of objects. There's a console.log right before that, and it is:

[Object, Object, Object, Object, Object, ...]

However, I got an error on the server side when I made this ajax call. The logs showed

2012-10-01T03:13:34+00:00 app[web.1]: Parameters: {"stuff"=>"[object Object]"}
2012-10-01T03:13:34+00:00 app[web.1]: WARNING: Can't verify CSRF token authenticity
2012-10-01T03:13:34+00:00 app[web.1]: NoMethodError (undefined method `to_hash' for "[object Object]":String):
2012-10-01T03:13:34+00:00 app[web.1]: Completed 500 Internal Server Error in 1ms

I'm unable to replicate the error. It's really confusing to me - what would cause that string to sometimes be passed to the server instead of the object?