Hi Matt, Perhaps the SSL is not in the Java 7 keystore but is in the Java 6 keystore. Use keytool to add SSL to Java 7 then while CF is configured to Java 7 restart CF and retest.
EG:
CMD prompt
CD D:\Program Files\Java\1.7.0_nn\jre\bin>
keytool -importcert -storepass changeit -noprompt -alias friendly_name -keystore ../lib/security/cacerts -trustcacerts -file d:\temp\certificate_file.cer
HTH, Carl.