TinyMCE Insert/Edit Link Checkboxes not updating

Hello,
i’ve noticed a bug in the current version (3.5.1) in TinyMCE.
When I add a link (write something, select the text and click on the Add/Edit link in TinyMCE) and check the box “Open in new Window” and click on Save it works fine.

Then I add another link, same procedure as above, and now the box in the popup is already checked. This is bug #1. Nevermind, i uncheck the box and save the link.

Now i edit the first link (with Open in new window) and change the url or something and save the changes.

After that i edit the second link (the one without target=_blank) and the box is checked again, although it should not. (in the source, there is no target=blank either)

I think javascript doesn’t refresh this box or updating the content fails.
I’ve tested this on 2 different environments, Chrome, Firefox on Mac OS X 10.8 and Windows 7 with chrome, Firefox and the bug occurs everywhere.
I deactivated all Plugins, switched to the default theme and i’ve even setup a fresh copy of wordpress.

Can anyone reproduce this bug?

Greetings