In a Google Webmaster Help thread talks about the different types of redirects Google likes and dislikes. I figured, since I just wrote about using redirects for affiliate links, it would make for a nice subtopic.
JohnMu, a Googler, strongly warned against using any type of meta-refresh redirect for any redirects. He said, when redirecting, it should be done on the server side level. Let me quote JohnMu from the thread:
How can you check what type of redirect you are using? SEO Consultants has a nice tool that shows you. You can see, that http://seroundtable.com/ redirects using a 301 server side redirect to http://www.seroundtable.com/:
Forum discussion at Google Webmaster Help.