InvalidAppConfigError: regex invalid: unbalanced parenthesis

[ruds]

Hello,
I got the following error while trying to execute the Hello World
application.
it happened when i have changed the app.yaml file from
application: helloworld
version: 1
runtime: python
api_version: 1

handlers:
- url: /.*
script: helloworld.py
to
application: helloworld
version: 1
runtime: python
api_version: 1

handlers:
- url: /stylesheets
static_dir: stylesheets

- url: /.*
script: helloworld.py

i changed removed the changes and i see that it works fine. is it a
bug or some OS configuration?

[peter.vk]

Issue tracked here:
http://code.google.com/p/googleappengine/issues/detail?id=20

Includes a workaround.

--
peter.vk