And I have tried posting comments to their blogs using IE, Netscape and also Opera browsers. I have tried clearing out my cookies and cache and nothing works. However, I would think that if it was a computer issue that I wouldn’t be able to post comments to my own blog as well and I don’t have any problems posting comments or replying to comments on my own blog. It is just massively frustrating to try to comment on someone elses WP blog and getting that error message.