There are two of the entries below in the web.xml:

<filter-mapping>
<filter-name>johnson</filter-name>
<url-pattern>/console/*</url-pattern>
</filter-mapping>

WebLogic will not deploy crowd until one of these is manually removed because the validation rules for web.xml in WebLogic do not allow this. This may or may not be a problem for other application servers.

Obviously this is easy to work around but it would be nice if it could be removed permanently.