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From: Tier Nolan <tier.nolan@gmail.com>
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Subject: Re: [Bitcoin-development] Miners: You'll (very likely) need to
 upgrade your Bitcoin Core node soon to support BIP66
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--001a114008caff10d205184e03d5
Content-Type: text/plain; charset=UTF-8

Once the 75% threshold is reached, miners who haven't updated are at risk
of mining on invalid blocks.

If someone produces a version 3 block that violates the new rules, then
miners who haven't upgraded will end up wasting mining power building on
that block.

This could be used as an expensive way to attack miners who haven't
upgraded.  It is low risk of happening, since creating an invalid version 3
block costs 25BTC in hashing power and the miner who does it ends up
creating an invalid block.

--001a114008caff10d205184e03d5
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div><div>Once the 75% threshold is reached, miners who ha=
ven&#39;t updated are at risk of mining on invalid blocks.<br><br></div>If =
someone produces a version 3 block that violates the new rules, then miners=
 who haven&#39;t upgraded will end up wasting mining power building on that=
 block.<br><br></div>This could be used as an expensive way to attack miner=
s who haven&#39;t upgraded.=C2=A0 It is low risk of happening, since creati=
ng an invalid version 3 block costs 25BTC in hashing power and the miner wh=
o does it ends up creating an invalid block.<br></div>

--001a114008caff10d205184e03d5--