Using the org-mode included in Emacs HEAD as of yesterday, the following content causes an error when exporting as html:
https://gist.github.com/purcell/5055957 Backtrace: Debugger entered--Lisp error: (wrong-type-argument stringp nil) string-match("\\([^\\\\]\\)\\([_^]\\)" nil) org-export-protect-sub-super(nil) org-export-normalize-links() org-export-preprocess-string(...) org-export-as-html(nil) call-interactively(org-export-as-html) Export as iCal works fine. The list of bare http links seems to be the problem, but until recently org-mode happily exported this content to html. -Steve
