Vanguard Scared Me

I got this email from Vanguard, in reference to Beth's IRA. Keeping in mind that we have executed ZERO TRANSACTIONS in months, look at what this email says:

1. Confirming your recent transactions.
2. Updated account profile

I was more confident than not that there would be an innocuous explanation, but I couldn't come up with a candidate hypothesis, so the thought of cybertheft did cross my mind. Then I logged into Vanguard's site, and my fears were quickly put to rest. They had simply converted the regular shares to "Admiral" shares. That is slightly beneficial. but essentially it is "inside baseball" within Vanguard. In the meantime, a good little scare.

In hindsight, I think they might have sent us a paper statement a month ago saying they would do this, but I certainly didn't recall it in the moment.