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what in fact did happen.  You don't know how to make a good report?  See

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------------------------------------------------------------------------

I can't get the right exported hyperlinks when there is "&" character,

but it work correctly in org-mode version 8.2.10.

The testing hyperlink: http://7xib25.com1.z0.glb.clouddn.com/Class&MetaClass.001.jpg

Emacs  : GNU Emacs 25.0.50.1 (x86_64-apple-darwin13.4.0, NS appkit-1265.21 Version 10.9.5 (Build 13F1112))

 of 2015-09-02

Package: Org-mode version 8.3.1 (8.3.1-95-g1dbb25-elpa @ /Volumes/passchaos/.emacs.d/elpa/org-20150831/)

current state:

==============

(setq

 org-src-lang-modes '(("dot" . graphviz-dot) ("ocaml" . tuareg) ("elisp" . emacs-lisp) ("ditaa" . artist)

                      ("asymptote" . asy) ("dot" . fundamental) ("sqlite" . sql) ("calc" . fundamental)

                      ("C" . c) ("cpp" . c++) ("C++" . c++) ("screen" . shell-script) ("shell" . sh)

                      ("bash" . sh))

 org-tab-first-hook '(org-hide-block-toggle-maybe org-babel-hide-result-toggle-maybe

                      org-babel-header-arg-expand)

 org-speed-command-hook '(org-speed-command-default-hook org-babel-speed-command-hook)

 org-occur-hook '(org-first-headline-recenter)

 org-metaup-hook '(org-babel-load-in-session-maybe)

 org-html-format-drawer-function '(lambda (name contents) contents)

 org-log-done 'time

 org-latex-format-inlinetask-function 'org-latex-format-inlinetask-default-function

 org-confirm-shell-link-function 'yes-or-no-p

 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default

 org-file-apps '((auto-mode . emacs) ("\\.mm\\'" . default) ("\\.x?html?\\'" browse-url file)

                 ("\\.pdf\\'" . default))

 org-export-with-sub-superscripts '{}

 org-latex-format-headline-function 'org-latex-format-headline-default-function

 org-after-todo-state-change-hook '(org-clock-out-if-current)

 org-latex-format-drawer-function '(lambda (name contents) contents)

 org-src-mode-hook '(org-src-babel-configure-edit-buffer org-src-mode-configure-edit-buffer)

 org-agenda-before-write-hook '(org-agenda-add-entry-text)

 org-babel-pre-tangle-hook '(save-buffer)

 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-archive-hook '(org-attach-archive-delete-maybe)

 org-ascii-format-drawer-function '(lambda (name contents width) contents)

 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point org-babel-execute-safely-maybe)

 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers org-cycle-show-empty-lines

                  org-optimize-window-after-visibility-change)

 org-plantuml-jar-path "~/Dropbox/backup/plantuml.jar"

 org-babel-tangle-lang-exts '(("D" . "d") ("C++" . "cpp") ("haskell" . "hs") ("latex" . "tex")

                              ("ruby" . "rb") ("python" . "py") ("emacs-lisp" . "el") ("elisp" . "el"))

 org-confirm-elisp-link-function 'yes-or-no-p

 org-metadown-hook '(org-babel-pop-to-session-maybe)

 org-html-format-headline-function 'org-html-format-headline-default-function

 org-startup-truncated nil

 org-completion-use-ido t

 org-babel-load-languages '((emacs-lisp . t) (python . t) (ruby . t) (sh . t) (latex . t) (plantuml . t)

                            (dot . t) (scheme . t) (R . t) (haskell . t) (C . t))

 org-html-format-inlinetask-function 'org-html-format-inlinetask-default-function

 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)

 org-confirm-babel-evaluate nil

 org-publish-project-alist '(("iOSNotes" :base-directory "~/org/iOS/" :base-extension "org" :recursive t

                              :auto-sitemap t :setupfile

                              "~/Desktop/org-html-themes/setup/theme-readtheorg-local.setup"

                              :publishing-directory "~/org/iOSHTML/" :publishing-function

                              (org-html-publish-to-html) :html-head: <link rel= "stylesheet" type=

                              "text/css" href=

                              "/Volumes/passchaos/Desktop/org-html-themes/styles/readtheorg/css/htmlize.css"

                              /> :html-head-extra: <link rel= "stylesheet" type= "text/css" href=

                              "/Volumes/passchaos/Desktop/org-html-themes/styles/readtheorg/css/readtheorg.css" /> :html-head-extra: <script src= "/Volumes/passchaos/Desktop/org-html-themes/styles/readtheorg/js/jquery-2.1.4.min.js" ></script> :html-head-extra: <script src= "/Volumes/passchaos/Desktop/org-html-themes/styles/readtheorg/js/bootstrap.min.js" ></script> :html-head-extra: <script type= "text/javascript" src= "/Volumes/passchaos/Desktop/org-html-themes/styles/lib/js/jquery.stickytableheaders.min.js" ></script> :html-head-extra: <script type= "text/javascript" src= "/Volumes/passchaos/Desktop/org-html-themes/styles/readtheorg/js/readtheorg.js" ></script>)

                             )

 org-after-todo-statistics-hook '(org-summary-todo)

 )