Dual WWW and non-WWW listings

[WebManager]

At the moment Google is double-listing one of my sites as both mysite.com and www.mysite.com. I've been waiting patiently for this to resolve itself, but it has now been 2 updates.

(I don't want a double listing - the site's SERPs would perform much better if it was all integrated, so to speak.)

I think it stems from a recent Yahoo! listing where they inserted WWW. - I'm pretty sure I didn't submit it that way.

Depending on the search term, I get different results for both - for example, on the WWW listing I am not listed as being in the Google directory.

Any suggestions about resolving this - I assume it sort itself out with time.

[SEOPTI]

Seems like a technical glitch at Google. My sites are also listed
with and without www.

[bcc1234]

Make sure your server returns a permanent redirect from one hostname to another.
Just pick one and use it as a main host.

Something like,
mydomain.com/page.html would return 301 with location www.mydomain.com/page.html

And www... would actually serve the page.

That way you collect PR for all links to www and to non-www hosts.