NO css loaded in admin in firefox, safari/opera/chrome OK..

[marald]

CMSMS v 1.11.4

After updating an old CMSMS to this new one, the admin area doesn't work like it should in Firefox. It looks like it doesn't load the css..

In other browsers it works as expected. But as my client uses firefox, I can't tell them to use something else. Why isn't it working with ff?

The error console of FF shows this error:
\Timestamp: 2/20/13 4:13:47 PM
Error: An unsupported character encoding was declared on the transfer protocol level. The declaration was ignored.
Source File: "http://sitename/new/admin/login.php
Line: 0

Any help welcome...

[Dr.CSS]

We will need to see your system information...