mmontala - 8:14 am on Feb 16, 2009 (gmt 0)
I think that is the culprit. Based on my observation when I enabled it again and integrating it on sitemap, it happens again. I have to remove those auto generated pages on my sitemap. Now the problem is how to gradually ad those pages to my sitemap since the sitemap plugin in wordpress don't have that feature. When you hit update, all of your pages will be included in the sitemap.
What's more likely to cause a problem, IMO, is the creation of 13X more urls for your site, all at one time. I would hesitate to let googlebot crawl all those auto-translations, and especially all of them at once. The profile for the site would be very much like autogenerated spam pages.