It is impossible to have closing brackets in a footnote, because they
are treated as the closing bracket for the foot note.  Example...

* A heading
This is a broken footnote.[fn:: Some book at [42-24].]

This will export to (as ASCII, for example)...
                          org-fn-bug-example
                          ==================

Author: Aidan Gauland
Date: 2010-08-31 20:33:14 NZST


Table of Contents
=================
1 A heading


1 A heading
~~~~~~~~~~~~
This is a broken footnote.[1].]

This will export to (as ASCII, for example)...

[1] Some book at [42-24

This is how I am required to cite books for my academic essays, so this
is a pretty serious bug for me (and no doubt other students, as well).

Regards,
Aidan Gauland

Emacs  : GNU Emacs 24.0.50.6 (x86_64-unknown-linux-gnu, GTK+ Version 2.20.1)
 of 2010-08-29 on dimension8
Package: Org-mode version 7.01trans

current state:
==============
(setq
 org-export-latex-after-initial-vars-hook '(org-beamer-after-initial-vars)
 org-agenda-files '("~/uc-files/uc-work.org")
 org-agenda-include-diary t
 org-completion-use-iswitchb t
 org-completion-use-ido t
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-export-blocks-postblock-hook '(org-exp-res/src-name-cleanup)
 org-export-latex-format-toc-function 'org-export-latex-format-toc-default
 org-export-preprocess-hook '(org-export-blocks-preprocess)
 org-tab-first-hook '(org-hide-block-toggle-maybe
org-babel-hide-result-toggle-maybe)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
org-src-mode-configure-edit-buffer)
 org-confirm-shell-link-function 'yes-or-no-p
 org-export-first-hook '(org-beamer-initialize-open-trackers)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
org-cycle-show-empty-lines
									org-optimize-window-after-visibility-change)
 org-export-preprocess-before-normalizing-links-hook
'(org-remove-file-link-modifiers)
 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)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point org-babel-execute-safely-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-export-interblocks '((lob org-babel-exp-lob-one-liners) (src
org-babel-exp-inline-src-blocks))
 org-occur-hook '(org-first-headline-recenter)
 org-outline-path-complete-in-steps nil
 org-export-preprocess-before-selecting-backend-code-hook
'(org-beamer-select-beamer-code)
 org-export-latex-final-hook '(org-beamer-amend-header org-beamer-fix-toc
org-beamer-auto-fragile-frames
															 org-beamer-place-default-actions-for-lists)
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-export-blocks '((src org-babel-exp-src-blocks nil) (comment
org-export-blocks-format-comment t)
										 (ditaa org-export-blocks-format-ditaa nil) (dot
org-export-blocks-format-dot nil))
 )