A simple one here but something that gets asked a lot on the forums, and is annoying.
Page list, by default, does not have an active link state. For those who don't know, this new file allows the page list to highlight the link of the current page the user is on.
Download this file, replace the page list view.php (best uploading to the top level blocks folder) and create your css style for 'a.page-list-active-link'.
Download the file here: