signature verification failed

Hi, since today I started receiving the following error whenever I try to id myself:

```
warn: When checking knl: VerifyError: merkle root: signature verification failed
warn: Likely this is a bug or transient error; but the server could be compromised
error: Import failed: found >1 fingerprints!
```

When I first joined keybase I had one key, which I immediately revoked, and then a day later I generated new one. A first couple of days everything was fine, and then I started seeing this error. I tried `keybase reset`, to no avail.

The report provides only the verification and import error messages, with no source file, test, or entry point named. Start by reproducing the identity flow and reviewing the behavior around `keybase reset`; done means identifying the cause of the signature verification failure and confirming that importing the current key succeeds.

Written by the indexing model from the issue text.