ImageCache Profiles module breaks Views

After installing the ImageCache Profiles module and selecting an ImageCache preset for profile images, I discovered that all of my custom Views had disappeared from the Views list, nor could I edit/display the views. Built-in or module-provided views remained in the list. Views reported: This view has a broken default display and cannot be used. when trying to edit one of the missing views by typing in the edit URL directly, as well as Error: Display refers to a plugin named '', but that plugin doesn't exist! Immediately disabling the ImageCache Profiles module restored the views.

I'm currently running Drupal 6.13 with Views 2.