Hi Helen, thank you for posting this on our g2g forum. It seems to be a very common error that is made, as I see it constantly myself. As a data doctor I know that this error is listed on their project page here:
https://www.wikitree.com/wiki/Project:Data_Doctors
Location errors are split into 3 groups as follows: 601-630 Birth location, 631-660 Death location, 661-690 Marriage location.
For example:
So we do have data doctors constantly working on those as well as other errors noted by the project.
PS: If you do see these errors on profiles in your watch list or on a profile you're interested in, there is no problem to go ahead and correct the lower case spelling of a location.