I searched for this but only found someone with a similar problem whose query wasn't answered. I recently deleted NextGen and its sister search plugin from my site, as it's not compatible with my new theme. I'm now getting e-mails from Google Webmaster Tools saying that they're getting hundreds of not found errors from all my ngg_tag URLs. How can I stop this from happening? I should perhaps add that I use Yoast's SEO plugin as well, though I can't see a way of stopping this through that.
Thanks so much in advance!