Due to an edge case programming error you may notice your unique visitor traffic is spiking if you do a high data volume with us. We regret to say that we made a mistake and you should ignore it. Please note this pertains to only the average and unique visitor traffic for events and properties not funnels or retention.

Rest assured we fixed the problem and looked for additional places where the same bug could also be. Taking how we run things here one step further, at Mixpanel we heavily are now using unit tests to make sure data is precisely 100% accurate all the time. Any change made that could effect how your data is computed and analyzed will be run against our unit tests to ensure we are always accurate.

As a startup we'll make mistakes but we're working towards increased stability both in our software and infrastructure. Things will only get better from this point forward.

If you have a question, please email us at support@mixpanel.com and we'll happily answer.