So apparently Salesforce chose to tweak its math in Code Coverage calculations with the Summer '15 release. So instead of passing all code coverage tests when deploying change sets, I'm now sitting at 74% code coverage when the minimum required is 75% :/ ....so now we will likely need to incur some costs with our local dev partner to modify all of our code (all 44 classes) to get us back in line. That...or I replicate everything I need to deploy from Sandbox element by element in Production :/

Passing along in case anyone else might be affected by it.

If you have Apex in your org, you need to see this!