Some time ago, a single link from some site has created a "sea" of broken links reported in Google Webmaster Tools.
The problem was the link in this form:
The ending slash was like a nuke - that is how I felt it, because Google started looking for endless links that had multiplied subfolders in them. Over 3,000 404s!
I fixed it by creating a redirect in .htaccess that pointed to the right page.
Anyhow, that was back in January 2009, and it took me not less then three months of begging via email until they finally fixed it. I believe it was a case of ignorance, not any kind of spam.
Now, I just saw 17 entries described as "DNS lookup timeout" under "time out" section.
Again, broken links that eventually redirect to the same page from the above, based on my redirect from January.
But, why time out, and where those links would come from? There are no reports under 404 or anything else where I could find the source of the problem (i.e. a referring link).
On another note, still inside Webmaster tools, I see that links from Google AdWords with that "gclid" variable have become a common thing.
Why? Do you think it's a bug (mistake) or...