Notifications on an update for the theme are the task of Stylish, as the program has an update mechanism built in. Simply click its statusbar icon, choose 'Manage styles...', then click the appropriate toolbar button. I couldn't find documentation anywhere if stylish did this style update search also on its own.
/edit:quote:
Originally posted by John Anderton
One bug in your style is that you get a blue bar on the top when you post something.
Style updated, do as described above to get the updated style, or just visit the
style home page and click the Update button there.