The problem with comments

Two good friends have emailed me to say that they have posted comments on my blog and their comments have not appeared. 

I am very sorry if this applies to you, dear reader. I am trying to find out what the problem is. So far I have drawn a blank. 

Usually when someone comments, I get an email to tell me about it and then I publish the comment. My intervention is to prevent spammers from flooding me with annoying rubbish.

I hope you'll bear with me until I resolve the problem.

update - I just got this message from the Blogger team: 

The Blogger team is aware of the issue and is currently working on a fix.