I just found out that Haloscan is holding the comments to my older posts hostage until I pay them US$12. I also see that Blogger has its own comments function, so I'm going to switch over to that and gradually get rid of the Haloscan comments by downloading them or something. So in the mean time, please click on the "Comments" link on the lower right hand side of posts you want to comment on. Thanks!
Update as of Nov. 13: As you can see, I've taken the Haloscan comments off of my blog. The comments that I could "save" have been copied to the "Blogger" comments section. Sorry for any inconvenience!