Changing the case of blogger article tags (labels)

You have added your tags nicely but one day you discover a horrifying discrepancy: you meant to have all your tags start with a capital letter, but a couple of them start with lowercase. So what do you do?

You go to each post, edit it, and change the lowercase letter to capital. Does it work?
No.

The solution? Simple.

1. Simply delete the offensive tags from the posts concerned.
2. Once you have deleted all the offensive tags from all posts concerned, edit again those posts, and add the tag with a capital letter.

Check out my labels, they are all lowercase, right? Well, they were not always...