Duplicate lower and uppercase keywords

[DigiTeamatDSV]

I get significantly different report cards for the same keywords with and without uppercase letters on the same URL.

The only difference between the two sets of keywords is the first letters of every keywords, e.g.:

"Air freight" - results in an "F"
"air freigth" - results in an "A"

Should I stick to lowercase keywords only - and won't the search engines ignore the case anyway?

[ChiarynMiranda]

Hi there,

I tried to look into this issue in your campaign and I am not seeing that you have any On-Page reports being run for the same keyword with different capitalization, so I was going to run test reports for the specific example you gave and I also don't see the keyword "air freight" with different capitalization in your keyword list, so I wasn't able to test exactly what you mentioned within the campaign.

I did run the test for Air Freight and air freight against the /air-freight/main-carriers page of your site in the stand-alone On-Page tool (http://pro.seomoz.org/tools/on-page-keyword-optimization) and I am seeing both versions of the keyword receiving A grades with exactly the same metrics counted for both, so they are being treated the same regardless of capitalization.

I was able to test within the campaign for the keywords Freight Consultants and freight consultants against the URL /air-freight/air-compliance/air-freight-consultants and those keywords also both return exactly the same reports with an A grade, so we are considering both versions of the keyword.

I'm not seeing a bug for capitalization of keywords in our system, so it would be really helpful if you could provide me with screenshot of the pages of where you are seeing this issue so that I can investigate further?

Thanks,

Chiaryn

[SEOAndy]

this sounds like a bug more than anything to me - maybe the moz team can shed some light on this.

The only time I've found a difference in ranking for caps vs non -caps is due to semantics and google knowing things like "church" and "Church" are different entities - in your own example though this wouldn't be the case ... hence i think its a bug.

mmm a puzzle