I recently updated to the latest org-mode version (using M-x
list-packages). Now M-x org-export-icalendar-this file
doesn't work. I get the following error message:
org-export-icalendar: Symbol's function definition is void:
org-prepare-agenda-buffers

More information below.  Please advise. Thank you.

Sincerely,
Felix Fernandes

Emacs  : GNU Emacs 24.3.1 (i686-pc-linux-gnu, GTK+ Version 3.4.2)
 of 2014-02-22 on chindi10, modified by Debian
Package: Org-mode version 8.2.10 (8.2.10-29-g89a0ac-elpa @
/home/vadmin/.emacs.d/elpa/org-20141222/)

current state:
==============
(setq
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point
org-babel-execute-safely-maybe)
 org-icalendar-include-todo t
 org-tab-first-hook '(org-hide-block-toggle-maybe
org-src-native-tab-command-maybe org-babel-hide-result-toggle-maybe
org-babel-header-arg-expand)
 org-agenda-use-time-grid nil
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
org-cycle-hide-inline-tasks org-cycle-show-empty-lines
org-optimize-window-after-visibility-change)
 org-agenda-custom-commands '(("pa" "A-priority" tags-todo
"+SCHEDULED<=\"<today>\"+PRIORITY=\"A\"") ("pb" "B-priority"

tags-todo

"+SCHEDULED<=\"<today>\"+PRIORITY=\"B\"")
                              ("pc" "C-priority" tags-todo
"+SCHEDULED<=\"<today>\"+PRIORITY=\"C\"") ("b" "Buy" tags

"+CATEGORY=\"BUY\"")
                              ("w" "Web" tags "+CATEGORY=\"WEB\"") ("k"
"Books" tags "+CATEGORY=\"BOOKS\"")
                              ("v" "Movies" tags "+CATEGORY=\"MOVIES\"")
("u" "Music" tags "+CATEGORY=\"MUSIC\""))
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-speed-command-hook '(org-speed-command-default-hook
org-babel-speed-command-hook)
 org-babel-pre-tangle-hook '(save-buffer)
 org-occur-hook '(org-first-headline-recenter)
 org-deadline-warning-days 0
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-agenda-sorting-strategy '((agenda priority-down) (todo priority-down
category-keep) (tags priority-down category-keep) (search category-keep))
 org-agenda-start-with-follow-mode t
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-agenda-prefix-format "  %-11:c% s"
 org-mode-hook '(#[nil "\300\301\302\303\304$\207" [org-add-hook
change-major-mode-hook org-show-block-all append local]
                   5]
                 #[nil "\300\301\302\303\304$\207" [org-add-hook
change-major-mode-hook org-babel-show-result-all append local] 5]
org-babel-result-hide-spec org-babel-hide-all-hashes my-org-mode-hook)
 org-agenda-start-on-weekday nil
 org-agenda-mode-hook '(my-org-agenda-mode-hook)
 org-directory "~/org/"
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-agenda-files '("~/org/todo.org" "~/org/home.org")
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
org-src-mode-configure-edit-buffer)
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-confirm-shell-link-function 'yes-or-no-p
 )