Assuming you haven't just checked "Text boundaries" on the View tab of
Tools
| Options, see “Margin marks or crop marks appear on each corner of the
page
when you open a document in Word 2002 or in Word 2003”
http://support.microsoft.com/?kbid=839371

I have no asian like language installed in language bar. Only my own (Danish
and Englsih)

The link you provided make it sounds like a bug. Isnt it a feauture which
you can intentionelly switch on and off? Or do you have to install a asian
like language to enable it???

Either way I have it (and its not page margins but crop marks) and NO asian
like language installed. Any suggestion where it came from then?

Thanks for your help so far!
Anders