Hi Jason, Not sure, but if you can access to your svn repo with different URLs ( https://www.<domain-ommitted>.com and http://www.<domain-ommitted>.com for instance) it's possible that you made a checkout via one URL (http://www.<domain-ommitted>.com for instance) and maven-release-plugin try with another URL specify in the scm section of your pom (https://www.<domain-ommitted>.com for instance).
We had a such of problem with one of our project and maven-release-plugin could also commit but not tag. I am not sure for the explanation but maven-release-plugin uses the svn client install in your computer. For the commit, it uses all the information in your .svn For the tag, it seems that it indicates the URL of the tags (specify in the scm section of your pom) but in your .svn the URL is different and the certificate is linked only with the checkout URL. HTH, Rémy
