I'm having a problem with creating email address links (in v5.2) but it only happens on Save.
If you type an email address in the editor, the editor automatically recognizes it as an email address and encodes it to create a link. This is great. But there are a couple of flaws afterward:
1) If you add another email address further down the page, it encodes that address as well, but actually uses the same address as the previous link. So if the first one is
test@test.com and the second one is
test2@test.com even though the text viewed is the same, both links are actually to the address
test@test.com until you edit the page, delete the second link in the html view (to make sure all the "A" tag is gone) and then in normal, retype the email address.
2) After reloading, and editting the email tag with the link icon, setting it to mailto:, it actually strips out the mailto: link and loads the hyperlink as just the email address with no "mailto:" If you edit and select "mailto:", ok the change, then immediately go to HTML view, and you'll see that the mailto: is removed again.