Blogger comments disappear after switching to custom URL

You need to edit the template HTML.

1. Click the Design tab
2. Click "Edit HTML"
3. Check the "Expand Widget templates" checkbox
4. Copy the entire contents of the textbox into your favorite HTML editor
5. Edit to your heart's content
6. Paste back into the box (replacing the old content)
7. Click "Preview", if here are errors or visual problems, go to 4
8. Click "Save Template"

Good luck

This worked for me:

I had a blogger blog, and using Google's options, I redirected it to a real www.example.com domain.

Now, AdSense ads would not show up on my blog.

Solution:

1. In Blogger dashboard, I clicked on Earnings.
2. In the main menu, I clicked on "My Ads".
3. The screen says, "Content > URL Channels"
4. On this screen, I clicked "+ New URL Channel"
   1. I typed in my new URL - the new .com one I purchased.
   2. Clicked Save and Bingo! - The AdSense ads now appear on my blog.