I think this is the right forum for this post.
I have a site that I regularly check in Webmaster Tools for crawl errors and such like.. I thought I had pretty much got them all sorted but just recently I have had 335 showing in the list. When I look at the URLs that are failing they're all invalid links, and they're being linked to from an external site - these URLs do not appear anywhere in my site.
My question is, will this adversely affect my rankings or anything else for that matter?
I want to have 0 crawl errors showing in my account but I guess that's not going to be possible. However, if there are no negative effects from the number of invalid links showing in there then I guess I can live with it.