In MT3, the persistent links to my individual blog posts used underscores to replace spaces:
http:// ... /2008/04/this_is_a_test.html
MT4 uses hyphens:
http:// ... /2008/04/this-is-a-test.html
I don't know if this happened because of something I set previously in MT3 or if it was the default. I couldn't find a way to tell MT4 to use the old (underscore) method so I went to each of those underscore files and set up redirects to the new hyphenated version. Google penalizes for this, so I'm wondering if there's a way to tell MT4 to use the underscores again and then rebuild my site.
Figured it out
Here's how to set MT4 to the old method of using underscores as the word separator for permalink URLs:
From the dashboard: Design - Templates. Click "Archive Templates" on the right sidebar. Edit the Entry template. Below the text box, there's a dropdown called Archive Mapping. The second one in the list is the one that uses _ instead of -
Thanks for finding this
Thanks for finding this and figuring out how to fix it.