CAT does not handle drupal_rebuild_form() in comment_alter_taxonomy_comment_form()

Any module that forces the rebuild of comment_form (project_issue and upload both do) will cause problems.

When using just with upload, if the comment settings are set to have a required preview, CAT will prevent the module from ever getting past the preview stage. With out a require preview, both upload and term alter works.

When using with the 6.x project_issue module, state of new taxonomy terms are lost. This is related to one of the 6.x project_issue blockers: #377596: Adding issue tags without a comment or change in other metadata does not work.