browse_sort_links() function returns link that not validates

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)

I'm not sure I'm following all the details. Could you give a link to the page so we can look at it directly?

This should be fixed in the latest code up on Github.

Thanks, the fix solves the problem.