Integration through Rest API impacted by 15A2?

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Did update 15A2 make any changes to the way the Rest API functionality worked? I ask because we have been been working on an integration between TBE and PeopleSoft, and the integration no longer works. The integration worked fine when we ran our testing on 4/15/2015, which was prior to the 15A2 release. At this point, we have managed to confirm that there were no changes at all on the integration software, the testing environment, or to PeopleSoft itself that occurred between 4/15/15 and today, which means the only thing that could have cause the failure is something on the Taleo side.