[O] Problem with org-agenda-custom-commands after update to 7.8.10

[Loris Bennett]

Hi,

I have just updated to 7.8.10 from the last stable version and now find
that whereas 

(tags-todo "+office+CATEGORY=\"task\"|+office+CATEGORY=\"project\"" 
                     ((org-agenda-overriding-header "Office TODOs")))

used to work, it now no longer does.  The section "Office TODOs" appears
in the agenda but without any todos.

Any ideas?
-- 
Loris