Hi Select,
The guides feature has been slightly changed in version 08. You now have a separate Guides view toolbar icon. By default you'll find it in between the Speed up image display and the show all layers toolbar icons.
When activated it will show the guides at any time.
Note: You can also create a view and file setting so that you can force the guides to be activated. If not, it can automatically open the view and file settings panel every time it is set incorrectly and fix it.
Mainly, when another user has messed up your settings
Cheers,
Brain