Hi Carsten,

It seems there is a mistake in org.el file.

Juraj

-(org-defkey org-agenda-mode-map [(shift right)] 'org-agenda-date- 
earlier)
+(org-defkey org-agenda-mode-map [(shift left)] 'org-agenda-date- 
earlier)

-(org-defkey org-agenda-mode-map [(shift right)] 'org-agenda-priority- 
up)
+(org-defkey org-agenda-mode-map [(shift up)] 'org-agenda-priority-up)