Add Media dialog is not being displayed in Opera 11.52

[vskjefst]

The Add Media dialog is not displayed in Opera 11.52 when clicking the Upload/Insert link on the add/edit post/page screen. The window is grayed out and the progress bar is displayed, but when the progress bar is removed, the Add Media dialog is not being displayed. The main window stays grayed out. Clicking anywhere in the window removes the gray and returns to the add/edit post/page screen.

Wordpress 3.3-beta3-19254, updated with the Wordpress Beta Tester plugin.

SSL is being used.

Opera Version information
Version: 11.52
Build: 1100
Platform: Win32
System: Windows 7

Browser identification:
Opera/9.80 (Windows NT 6.1; U; en) Presto/2.9.168 Version/11.52

Do you see any errors in Dragonfly (Opera's developer tools)?

Trying to reproduce this bug again to check the Dragonfly output, the Add Media dialog now opens. Ain't that just typical. I've restarted Opera since I first reported the bug. Sorry for the inconvenience.

​http://wordpress.org/support/topic/edit-image-dialoguemedia-uploader-not-appearing-chrome

Tracked the problem to thickbox.css being loaded from the cache. Last change was [18482].

In [19318]:

Thickbox cache busting. Fixes #19240.

Also bumped thickbox.js for [19264].