[Plugin: Viper’s Video Quicktags] The “adding link window” doesn’t close

Hi,

Since I have installed WordPress 2.8 the Viper’s Video Quicktags plugin is not working well, in the sense that if I write a new post and put a link to video on youtube using VVQ, after I press the OK button, the window doesn’t close.
Even if I try to press cancel, or try to move this window, it stays the same.
To mention that when I press OK, the plugin does its job and puts the tag in the post, and when I press “Publish”, the post looks fine.
The real problem is that window that won’t close.

Any idea how to fix this? Thanks in advance.

Best regards,
Chris