[XeTeX] what did i do?

[Martin Henning]

Hello list,

after i finally got to work all my unicode stuff thanks to xetex and  
your help, i just noticed something weird:

neither \textit{} or \empf{} markups show up in the resuulting  
document. i know, that i have already seen it in a xetex-compiled  
document, but somehow i seem to have messed it up? some declaration  
that overwrites this feature? i get no errors at all, the result just  
doesn't show up... any ideas as to what i could have done?

Tnx,

Martin