Hi,

Selecting a subtree only, export to html fails if the subtree contains 
a src block. Using 7.01trans, freshly pulled, on Emacs 23.

Example

file: test2.org
-----------------------

* Heading 1

Text

* Heading 2

Text

#+begin_src emacs-lisp
   (message "Something funny with export")
#+end_src

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

Exporting the whole works fine.

Exporting the first subtree (C-c C-e 1 b) works, but leaves an active 
region around the subtree.

Exporting the second subtree fails, producing no output, with these
messages:

: Exporting...
: org-babel-exp processing...
: org-open-file: No such file: /Users/CM/org/test2.org::

A backtrace is attached.

Yours,
Christian