I've recently changed URLs to lower case. I'm also suffering from about 15% traffic drop from search engines, which started about a week after my change. Can this be related?
This is what I've done. Till now I've had all pages URLs look like this
http://mydomain.com/folder/Page. And all internal links in the site were also to
All these have now turned into:
And the page that still exists at
http://mydomain.com/folder/Page has been add this in HTML
<link rel="canonical" href="/folder/page" />
Have I done anything wrong? Would you recommend me to put it back to the way it was?