Regenerate auto excerpts after updating many posts

I had around 100 posts that I imported into my blog. Many of the special characters (e.g. apostrophes, etc) were mangled upon import. I finally went through and fixed them all manually by editing each post and updating it. My theme displays the automatic excerpt of each post on the front page and these have NOT updated. My question is: How can I get WordPress to regenerate the automatic excerpts for all the posts? I’m using 3.5.2 and my theme is using “the_excerpt();” template tag to display these. I haven’t used the manual excerpt field to make any of these excerpts.

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