Bulk changing labels in Blogger

Say you decide to change the naming scheme of your labels, so you need to change one label into another.

You cannot directly do this, but what you can do is select all the posts with a given label, and apply a news label to them, and then remove the ld label. The help posting http://help.blogger.com/bin/answer.py?hl=en&answer=50644 tells you how.