Someone made a fake key for each of the participants in a particular keysigning party in October 2013 (including me) and uploaded the fake keys to keyservers. Because the creation date of the fake key for me is newer than the creation date of my real key, apparently Enigmail is suggesting it to people and they're choosing to use it, despite the lack of signatures.

More than a dozen different people have now sent me encrypted mail that I couldn't read because they selected the fake key on the keyservers instead of my real key.

That makes me think that the web of trust model isn't working out very well under active attack -- at least, over a dozen people failed to actually use the web of trust to avoid falling victim to this attack.

There are also seven keys for Erinn Clark (who signs Tor Browser Bundle releases for the Tor Project) on the keyservers; if I remember correctly, three are real and four are fake.