>>Site change,
>>
>>I need to be admin to update FF, and I have not done this yesterday. The change was in your morning, and changed other stuff too, for example the link in my signature was misaligned before this change.
>>
>>Except that the font is ugly, nearly monospaced, anything else is aligned properly.
>
>Just fire up FF's inspector and find out that the current font for this style is set to "Calibri,Arial,Helvetica,sans-serif", in the page itself (i.e. not in a .css).

Igen.
But this should not change from my browser to your browser? I have never altered anythin in UTs setting regarding fonts.