One week ago I installed org-drill using the last version of org-mode (tarball version) and everythings were fine.
A few days later I tried to install it using elpa (since it's easier to be update). But after installation I was getting this error:
Making completion list...
Collecting due drill items: 0 |.......................................
Creating unique IDs for items (slow, but only happens once)
mapcar: Wrong type argument: listp, \.\.\.
After a lot o tries to solve this problem I decided to back to old approach and using the tarball version. I added this package to the load path and as you are seeing bellow this package is shadowed the default version of emacs:
~/.emacs.d/thirdparty/org/lisp/org-bibtex hides /usr/share/emacs/24.3/lisp/org/org-bibtex
~/.emacs.d/thirdparty/org/lisp/org-capture hides /usr/share/emacs/24.3/lisp/org/org-capture
~/.emacs.d/thirdparty/org/lisp/ob-io hides /usr/share/emacs/24.3/lisp/org/ob-io
...
Since I downloaded the tarball named org-8.2.5h.tar.gz I suppose executing M-x org-version I have to get version 8.2.5 of org-mode, but this is what I'm getting:
Org-mode version 7.9.3f (release_7.9.3f-17-g7524ef @ /home/shahin/.emacs.d/thirdparty/org/lisp/)