I have known from friends that they have had problems posting comments on my blog, and have worried how many people that I don't know have tried unsuccessfully!
Saw this PSA on the Never Say Never Greyhounds blog, and it made sense - turns out people have problems posting comments on Blogger blogs if comments are set to "Embed below post".
I have now changed the settings on my blog. Check out the above post on NSN Greyhounds for a how-to, if you are a blogger with the same problem.
Please do come back and comment if you can, would love to hear from you!