Object function (a){return new m(a)} has no method 'omit'

Hi,

Just upgraded to 3.5 and I’m having a problem bringing up the Add Media screen when pressing the button. The Javascript error is as the title, full trace is

Uncaught TypeError: Object function (a){return new m(a)} has no method ‘omit’ media-views.js:387
media.controller.Library.media.controller.State.extend.initialize media-views.js:387
g.Model backbone.min.js:10
media.controller.State.Backbone.Model.extend.constructor media-views.js:229
d backbone.min.js:38
media.view.MediaFrame.Post.media.view.MediaFrame.Select.extend.createStates media-views.js:1613
media.view.MediaFrame.Select.media.view.MediaFrame.extend.initialize media-views.js:1494
media.view.MediaFrame.Post.media.view.MediaFrame.Select.extend.initialize media-views.js:1603
g.View backbone.min.js:33
media.View.Backbone.View.extend.constructor media-views.js:1198
d backbone.min.js:38
d backbone.min.js:38
d backbone.min.js:38
d backbone.min.js:38
wp.media media-models.js:30
wp.media.editor.add media-editor.js:453
wp.media.editor.open media-editor.js:620
(anonymous function) media-editor.js:639
v.event.dispatch jquery.js:2
o.handle.u

Seems it’s this line causing the problem

props = _.omit( props, ‘orderby’, ‘query’ ); (line 387)

if I comment it out the Add Media screen comes up but I can’t see my library of images?

I’ve tried stuff I’ve seen for similar issues on other threads such as define(‘CONCATENATE_SCRIPTS’, false ); in the config file and disabling all plug ins but no luck?

Any kind sole with any ideas?

Thanks
Neil