FYI, we are changing how Karma is stored on the back-end to make calculations faster and more efficient. As a result, we have to convert all the historical karma data which will take a few hours to process.
In the mean time you may notice that the Karma graphs in profiles is incorrect. This will resolve itself by tonight or early tomorrow morning.
You may also notice small changes to your overall Karma as a result of how the new karma is stored. Any change will be very small, if there is even one at all.