The website I'm working on can have both upper and lower case URLs, even though they will produce the exact same content. eg: http://www.freeofficefinder.com/uk/office-space/london/soho and http://www.freeofficefinder.com/uk/office-space/london/SOHO Will both produce the same search results for the area "Soho".
I have just placed a "Lower Case" canonical url in the all the pages now seeing as Google was obviously complaining about "duplicate" results. After almost 4 weeks these pages are still listed as being duplicate even though the Canonical URL is lower case (even for the uppercase links)
Is there something else I should do, will this "canonical URL" work, or should I just wait a little longer for Google to update my index in Google Webmaster Tools?