[Koha] Nonfiling characters and sorting

[Paul A]

I'm not sure if it's just our catalogue, so would ask for confirmation (or 
denial) by others before exploring further.

In both OPAC and staff interface, the "sort" drop-down defaults to 
'relevance', but for longer pages users and staff sort by 'title A-Z'. 
Normally a biblio with a 245 second indicator set to, say, 4 drops 'the ' 
(3 chars and space), but we are finding that it does *not* drop German 
articles such as 'der ' and 'die '

Example: 
<http://opac.navalmarinearchive.com/cgi-bin/koha/opac-search.pl?idx=au&q=nowarra&sort_by=title_az:> 
which has both English and German usage.

Has anyone else noticed this?

Thanks -- Paul