WordPress recently updated their commenting system to force people who enter an address associated with a WordPress/Gravatar account to sign in.
Unfortunately, I have no control over this. Please see the article here, which contains a link to reset your password if you’ve forgotten it. Apparently this “improvement” to the comments function was a knee-jerk reaction to placate a certain VIP who was apparently having his identity forged on comments. As the article shows, though, it’s still easy enough to do without this stupid change.
What’s really irritating is that you cannot delete a WordPress account – so if you ever signed up for one (or for a Gravatar) using your email address, even if you never had a blog, you are still going to be required to log in.
However, at long as you enter what appears to be a valid email address, you can still comment – it doesn’t have to be valid. I’m going to suggest entering “wp.” in front of whatever your real email address is. If I see that, I’ll know to remove it for any replies.
For example: instead of username@domain.com, enter wp.username@domain.com
I’ve also modified the settings so that you don’t need to enter an email address at all. (But please leave a name, so I know who you are!)Ā I may have to change that back if I start getting too much spam, but at least it will be another option for you.
Sorry for the inconvenience!
CabledSheep 
What an annoyance. š¦
It is a bit of an annoyance, but to comment on a friends blog is worth it. However, I like your idea of putting in a fake email. Who knows if it will work!?
I.have.no.idea/whatwordpress.issues.are@bcI’mtoochickentoblog.goofy
Since I don’t have a wordpress account and have just always used my email addy, I’ve not run into the issues.. yay! (but I had to check it out and make sure š
Ok, now I know what Carolyn is saying when she says she can’t leave me a comment and that my blog hates her. Ugh! I don’t want to have to change blog services again!!! Thanks for the info.
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Bastards!
What a shame none of those children realize that we don’t have time for jumping through hoops.