Opera: Error in LeftAndMain_right.js CMSForm.loadNewPage: Statement on line 102: Cannot convert undefined or null to Object

[SCdF]

I am using Opera9.5beta under Ubuntu7.10

The error occurs in your test site, in the admin center, under the 'Files & Images' tab. It occurs when I click any of the folders on the left.

Full stacktrace: <demo.silverstripe.com>

Error in LeftAndMain?_right.js CMSForm.loadNewPage: Statement on line 102: Cannot convert undefined or null to Object Backtrace:

Line 102 of linked script http://demo.silverstripe.com/cms/javascript/LeftAndMain_right.js

allIframes[i].contentWindow.location.href = allIframes[i].src;

Line 224 of linked script http://demo.silverstripe.com/cms/javascript/LeftAndMain_right.js

this.loadNewPage(response.responseText);

Line 205 of linked script http://demo.silverstripe.com/cms/javascript/LeftAndMain_right.js

$('Form_EditForm').successfullyReceivedPage(response,id);

Line 833 of linked script http://demo.silverstripe.com/jsparty/prototype.js

(this.options['on' + status]

Line 794 of linked script http://demo.silverstripe.com/jsparty/prototype.js

this.respondToReadyState(this.transport.readyState);

... Line 162 of linked script http://demo.silverstripe.com/jsparty/prototype.js

return method.apply(object, arguments);

...