If you have made previous reservations prior to today check them! I cleared my account prior to todays changing and all my reservations on full points have changed and had a cash component added.
eg-: I made a standard rewards redemption for Tallin Hilton and Helsinki Hilton, at 30,000 points they have now been changed to 30,000 points plus 27 euros.
Conrad Hong Kong changed from 70,000 points to 70,000 points plus 302 HKD. Ive tried calling HH but they refuse to honor the initial rates, is this not breach of contract?