Yes CBSA put out a revised memorandum that makes flippers and assisted opening knives with flipper tabs prohibited weapons.
Paragraph (a) weapons
18. Weapons that fall under paragraph (a) include the following:
(a) Automatic knife An automatic knife is one that houses a blade that will open automatically by applying hand pressure to a button, spring, lever, or other device, in or attached to the handle of the knife, including knives that have a button, spring, lever, or other device, located in the spine of the handle and attached to the inner part of the blade.
Note: Knives that have a thumb stud attached to the blade of the knife, that is independent of the handle (not protruding from the handle in the closed or folded position), and that open automatically by applying pressure to the thumb stud, do not generally meet the above definition of a prohibited weapon, and as such do not generally fall under TI 9898.00.00. However, if such a knife is found to also open by gravity or by the application of centrifugal force alone, it may still be considered to be prohibited. The misuse of knives may nonetheless be punishable under other laws.