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Morning Edition · Friday, September 18, 2026Published at 1:52 AM EDT · New York
Ethereum Sets October 6 for Glamsterdam on Sepolia as Developers Warn About Fake Block Builders
Free testnet ether lets a builder outbid real competitors and then withhold the block contents, a griefing path that arrives with the upgrade that moves block building into the protocol.
Ethereum developers have fixed October 6 as the target for activating the Glamsterdam upgrade on the Sepolia test network, and in doing so they have accepted a compressed review window. Client teams get roughly half their usual time to exam…
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