The Views Bookmark module is unsupported! It has been migrated to the Flag project.
Views Bookmark will NOT be upgraded to Drupal 6. Flag module provides a full upgrade path for all of your data from Drupal 5 to Drupal 6, including any Views you have configured using Views Bookmark.
Upgrading from Views Bookmark
A list of API changes and upgrade instructions may be found on the handbook page for upgrading to Flag from Views Bookmark.