If you see an error in puppet, the chances are that you have some kind of configuration setting
Warning: Unable to fetch my node definition, but the agent run will continue:

Warning: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed: [self signed certificate in certificate chain for /CN=Puppet CA: puppet]
Error: Could not retrieve catalog from remote server: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed: [self signed certificate in certificate chain for /CN=Puppet CA: puppet]
Warning: Not using cache on failed catalog
Error: Could not retrieve catalog; skipping run
Error: Could not send report: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed: [self signed certificate in certificate chain for /CN=Puppet CA: puppet]

The chances are that you have some conflicts when using an old puppet master, the SSL Certificates might be configured wrong.

find /var/lib/puppet -type f -print0 |xargs -0r rm