Hi all, My good friend Susan helped me out of a pickle yesterday and I'd like to share what she told me with you all because it affects all Blogger blogs. I found I couldn't leave a comment on my own blog (to answer another comment). It kept asking me to sign in then wouldn't recognise me and consequently I lost the comment and it wasn't published, instead I just went round in circles - very frustrating!! Susan's answer was on blogs with embedded comments, untick the 'stay signed in' box and you should be able to leave a comment (once you sign back in it should publish). For those with embedded comment forms on their blogs, if you switch to either pop-up or full page comments your followers will no longer have this problem. The setting is under Settings then Comments.
Update - I just did a search and came up with this answer from the Blogger support forum, it might help if the above suggestion doesn't.
I was in Japan
2 days ago