v0.0.1 (Redmine 1.2.x) - The oldest version I could find.

Website: http://www.redmine.org/plugins/issue_checklist
File: http://www.redmine.org/attachments/download/6671/redmine_issue_checklist-0_0_1.tar.gz
v1.0.0 - no code, just update to Changelog
v1.0.1 - no code, just update to Changelog
v1.0.2 - no code, just update to Changelog
v1.0.3 (Redmine 1.4.x, 1.3) - last version for Redmine 1.x stream.

Bug: Drop checklist on update if no checklist permission

Website: http://redminecrm.com/projects/checklist/pages/1
File: http://redminecrm.com/license_manager/1833/redmine_issue_checklist-1_0_3.tar.gz