Validating my new theme using W3C validator, I get an error:
& did not start a character reference. (& probably should have been escaped as &.)
which is caused by the browse_sort_links() function that generates link:
<a href="/items/browse?page=1&sort_field=Dublin+Core%2CTitle"...
To be correctly validated, the link should use the & escape sequence ISO the single '&' sign.
It looks for me like a bug. Can it be corrected?
(Omeka 2.1.4)