In resteasy-jaxrs the test org.jboss.resteasy.test.providers.iioimage.TestIIOImageProvider.testPostJPEGIMage() test fails on machines with OpenJDK (both 1.6.0 and 1.7.0) installed.
Assertion at the end the test fails as array of bytes returned from server is different (both in size and values) from that obtained directly from test data.

Note:
Issue was already addressed in the past as this assert also failed on Oracle (Sun) JDK 6 and was resolved for Oracle JDKs in 10/28/11 (read in comments after test)