When I try to post comment on sites with CommentLuv, sometimes there is no problem with my feed and CommentLuv shows my recent posts. But on some blogs I get this error: "A feed could not be found at ..." Though I see other people have no problem on the same blog.
Here is my site:
Here is a sample site where CommentLuv works for me:
And here is a sample site where CommentLuv doesn't work for me:
So, what could be the problem?