Cannot delete PPPs or GIF tunnels

[JackTripper]

i've created some PPPs and GIF interfaces, and now i cannot delete them:

Click the Delete button, and click OK:

Wait for the server to respond, and the interface is still there:

No error; it just didn't work.

Tested in Internet Explorer 9, and Chrome 12:

pfSense version: built on Sun Jul 31 05:05:32 EDT 2011 2.0-RC3 built on Fri Jul 29 22:08:01 EDT 2011

Edit: with http trace:

Request URL:http://192.168.1.1:8000/interfaces_gif.php?act=del&id=0
Request Method:GET
Status Code:302 Found