Tits Up gotta love it.
well possibly I think the issue is editing a string and html. This was fixed in the latest release of classifieds I added an extra line in pp-inc.php where noted
Code:
Content visible to verified customers only.
Feel free to download the code and upload pp-inc.php or just add the extra line in bold. You should then be able to add html to language strings. This change that CC0000 color to whatever you wish and change.