Piwik Admin broken pages

Hi everybody.

I noticed that most of my Piwik installation’s settings pages are broken before a complete ending.
I mean, when I see the source code of Settings - General Settings, the last HTML tag is a closing . There are no closgin or , so I believe I’m missing something.
The same happens on all the otrher Settings pages: User settings, Users, Websites…

I’m running Piwik 1.8.3 on Windows 2008 R2, IIS 7.5.

Any ideas?

Do you see any error in your apache error logs?

Hi Matt, thanks for your answer.
No, there are no errors. I’m running IIS, not Apache.