In the Advanced Search Tips table the title "URL" is uppercased via css style:
HTML sourse looks like this:
<th scope="row" class="tt-uppercase">url</th>
Such approach is not suitable for localized sites like Stack Overflow in Russian:
The sub-word "АДРЕС" (means address) should not be uppercased here. Much better way is to manage case sensitivity via translations on Transifex.