Why am I getting a certificate validation error?
At the moment, the structure of our sub-domains causes our certificate to display as invalid when trying to connect to https:// in Subversion. This is due to the fact that OpenSSL does not come installed with root certificate authorities. You can simply accept this certificate permanently and your SVN traffic will be secure.
If you have problems accepting the certificate...
In some Subversion clients (like svnX, Coda), the option to accept the certificate does not exist. In order to accept the certificate, go in to Terminal or Command line and try to do a checkout of your repository.
svn list https://account.svn.beanstalkapp.com/repo
This will prompt you with the certificate warning. Choose (p) to accept it permanently.