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 http://mydomain.com/folder/Page2.All these have now turned into: http://mydomain.com/folder/page and http://mydomain.com/folder/page2.And the page that still exists at http://mydomain.com/folder/Page has been add this in HTML <head>:        <link rel=canonical href=/folder/page />Have I done anything wrong? Would you recommend me to put it back to the way it was? 
Can a change of all URLs to lower case with canonical from others cause traffic loss?
seo;google;url;case sensitive