yaz_ccl_parse oddities

i am not sure how to tackle this problem :

search.inc, ccl2rpn() :
QUERY $query="bge_aut_1 = ( Bachmann Rüdiger )"
will be resolved by yaz_ccl_parse to
RPN $rpn=( errorcode -> 0 rpn -> @attr 6=1 @attr 5=100 @attr 4=1 @attr 
3=3 @attr 2=3 @attr 1=1004 Bachmann\ Rüdiger )
i think the slash is absolute mess ...

configured search params in this case are :

"u=1004 r=3 p=3 s=1       t=100 c=1"

l.g.
wolfgang