I am unable to post on my Google blog when using Internet Explorer 8. Others have found the same problem with Internet Explorer 9.
Today I received an email from a friend who said they were unable to post any comments. I don't know what browser my friend uses.
So there seem to be problems right now if you are using Internet Explorer.
To post this, I've used Firefox.
If you're having problems you might want to try a different browser too.