Just adding a [comment from the JIRA ticket](https://issues.apache.org/jira/browse/JCLOUDS-427?focusedCommentId=13882923):
> Just FYI, updating to 1.6.4-SNAPSHOT built from the JCLOUDS-427-1.6.x branch > (with guava 14.0.1) seems to perfectly fix the 7u51 incompatibility in our > application --- Reply to this email directly or view it on GitHub: https://github.com/jclouds/jclouds/pull/263#issuecomment-33401213
