Uncaught TypeError: Cannot read property 'global' of undefined

Hello,
first of all thanks for the nice module. Its a really nice functionality which makes using media more user friendly.

I came across this error. It breaks the "edit" function of image items. The edit modal opens but loads endlessly.

Uncaught TypeError: Cannot read property 'global' of undefined                         media.js?n53q4k:20
(anonymous function)                                                                                                     media.js?n53q4k:20
e.extend.each                                            jquery-1.7.1.min.js:2
e.fn.e.each                                                 jquery-1.7.1.min.js:2
$.fn.once                                                   jquery.once.js?v=1.2:55
Drupal.behaviors.mediaElement.attach      media.js?n53q4k:17
(anonymous function)                                drupal.js?n53q4k:76
e.extend.each                                            jquery-1.7.1.min.js:2
Drupal.attachBehaviors                             drupal.js?n53q4k:74
(anonymous function)                               drupal.js?n53q4k:412
n                                                               jquery-1.7.1.min.js:2
o.fireWith                                                  jquery-1.7.1.min.js:2
e.extend.ready                                          jquery-1.7.1.min.js:2
c.addEventListener.B

It occurs in combination with the following modules:

Drupal 7.23
Media 7.x-2.0-unstable7+38-dev
Media Browser Plus 7.x-3.0-beta2
Manual Crop 7.x-1.4+115-dev

Not sure if its caused by your module but if I disable it everything works fine except of the multiselect of course.
I would appreciate any help.
Cheers, Moritz