Starting with version 0.18.0.59 of the Java SDK, the Jersey library has been removed and replaced with the Apache HttpClient library. This was done due to the fact that Jersey doesn't support the PATCH verb for HTTP requests, and they have declined to fix it.
This change shouldn't have any noticeable effects when consuming the SDK, other than requiring that you update your dependencies. Please report any issues you come across with a new post in this category.