Resolution to workflows not publishing

CRM 4.0 rollup 2 seems to be the cause for workflows no longer publishing. So follow these steps to resolve the issue.
Find the CRM web.config file and make a copy/backup of it.
Open the web.config file and browse to the AuthorizedTypes section
Paste in the following text:

Save and close the web.config file. That is it. Microsoft mentioned they should have a KB artical about this soon.

-Laura