I found that mailto links had been incorrectly processed into raw links (and were therefore showing up as unknown links). So I corrected that, and in the process fixed the $node->linkparts->externalselector property to no longer include the connector portion ("://") of the address string.
I've just rolled these corrections into the 1.05 file, so if you downloaded on Saturday, download again. Easy way to tell: if your mailto: links show up with the "unknown" decorators, you've got the wrong version.
- Henrik