XML issue

Hi,

I’ve noticed that in the Admin area of my WPMU 2.71 installation, when I go to Admin>Blogs and click the Edit,Delete, Archive,DeActivate, or Spam buttons for any of the blogs, I get an XML file displayed with this error:

This XML file does not appear to have any style information associated with it. The document tree is shown below.

-<playlist version="1">

?<trackList>

?<track>

<location>/wp-admin/wpmu-blogs.php</location>

<meta rel="type">image</meta>

<image>/wp-admin/wpmu-blogs.php</image>

</track>

</trackList>

</playlist>

Any ideas on this?