The following rulings were silently edited in about a dozen cards. It’s just Damage Step-related changes.
Only the reviewed rulings are listed:
Dragunity Knight – Gae Bulg:
•This effect cannot be activated during Damage Calculation.
Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=8414&request_locale=ja
Attack of the Cornered Rat:
•This card cannot be activated during Damage Calculation.
Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=8227&request_locale=ja
Spell Reactor ・RE
•This effect cannot be activated during the Damage Step.
Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=8002&request_locale=ja
Trap Reactor ・Y FI
•This effect cannot be activated during the Damage Step.
Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=8000&request_locale=ja
Skull Meister
•This effect cannot be activated during the Damage Step.
Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=9278&request_locale=ja
T.G. Blade Blaster
•The effect that negates the effects of Spell and Trap Cards is a Quick Effect. Also, this effect cannot be activated during the Damage Step.
Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=9513&request_locale=ja
Lavalval Ignis
•This effect cannot be activated during Damage Calculation.
Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=9602&request_locale=ja
Bujingi Turtle
•This effect cannot be activated during the Damage Step.
Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=10621&request_locale=ja
Muzurhythm the String Djinn
•This effect cannot be activated during Damage Calculation.
Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=10125&request_locale=ja
Photon Strike Bounzer
•This effect cannot be activated during the Damage Step.
Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=10066&request_locale=ja
Constellar Praesepe
•This effect can be activated during the Damage Step up to Before Damage Calculation
Source: http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=10003&request_locale=ja