Forum Moderators: open
First issue:
Since the URL with the underscores are indexed, if someone clicks on it, it takes the user to the homepage...is this bad?
Second issue:
How long before google drops the old URL's and replaces them with the new ones?
Any chance of problem occuring here? I basically just deleted the old htm files off the sever, and replaced them with the new ones (with the hyphens), then made changes to where my links point to from my index and sitemap.
While a pain to set up, it works great for both your visitors and your bots. The old page soon falls out of the Google index, while still having it around in the short term allows people to still get the info they want easily.