A customer (via their customer liaison) had a question about the meaning of the lock overlay icon. Another colleague responded with a link to a site that contained an explanation.
I read the linked article and thought to myself, "Wow, that article sounds an awful lot like something I would have written." The style of the writing is similar to mine, and the phrases "Given the changes in how people use computers", "visual clutter", and "the value ... diminishes" particularly struck me.
And it turns out the reason it sounded so familiar was that in fact was something I had written. I wrote my article in 2009, and the plagiarized article came out in 2010.
My colleague apologized. "I realized that I should have searched your blog first. The link I posted was the leading search result on both Bing and Google."
Great. My original content loses to the site that scrapes my content. I must be doing this wrong.
(This was before they migrated the blog to the new server, so don't blame the migration for the poor search ranking.)