Most readers of
Blogspot based blogs are using either the http://pkblogs.com/(blog url) or http://inblogs.net/(blog url) to access the
blogs. I believe are facing issues in commenting on other blogs
too.

A quick fix for this situation is to open the comments page in another window/tab (as your browser permits), and then removing the {http://www.inblogs.net/files.php?file=} prefix from the address bar…..leaving only {http://blogger.com} (and so on…) there.

That way you can open the comment page.

Comment away!