Ethereum developers have delayed the Glamsterdam upgrade on the Hoodi test network after security researchers flagged potential risks to existing smart contracts. The proposed changes to gas accounting could allow errors to become permanent or cause valid operations to fail. ChainSecurity's analysis indicated that the new gas rules might alter how contracts handle failed transactions, leading to unexpected behaviors. No new date for the Hoodi test has been announced, and the mainnet upgrade date remains unconfirmed.