Since a few days I started to irritate myself because of the following line in a website (joomla website) I was developping (www.dimdy.nl):
laatst geupdate op (wednesday 08 august 2007). This site language was set to dutch, and the country layout to nl_NL. This used to work on other sites.
After trying different settings this one finally worked for me nl_NL.ISO8859-1.
If you got the same problem, try one of these settings:
nl_NL
nl_NL@euro
nl_NL.iso88591
nl_NL.iso885915@euro
nl_NL.ISO8859-1
nl_NL.ISO8859-15
nl_NL.utf8
nl_NL.utf8@euro