Various issues with rules extension

I have the following two issues with sonar 1.8 and rules extensions. Can anyone help ?

http://jira.codehaus.org/browse/SONAR-941
Description : when adding a rule extension, the rule is registered as a CS, PMD and findbugs rule

http://jira.codehaus.org/browse/SONAR-942
Description : rules configuration export as XML fails

Thank you,

Michel