Stacking list traversal improvements
Stacking list traversal improvements

darcs-hash:20070506131253-4eba8-c954f6cbee2545e67aca2b3bdfeb2b1525bb5dcf.gz

raboof/notion,knixeur/notion,neg-serg/notion,anoduck/notion,anoduck/notion,p5n/notion,dkogan/notion,dkogan/notion,dkogan/notion.xfttest,raboof/notion,p5n/notion,p5n/notion,knixeur/notion,dkogan/notion,p5n/notion,dkogan/notion.xfttest,anoduck/notion,anoduck/notion,raboof/notion,neg-serg/notion,dkogan/notion.xfttest,dkogan/notion,p5n/notion,knixeur/notion,anoduck/notion,knixeur/notion,neg-serg/notion,raboof/notion,neg-serg/notion,dkogan/notion.xfttest,dkogan/notion,knixeur/notion