http://www.hydrogenaudio.org/forums/　から、適当に。
（　）の中はさらに適当な要約。
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（3.98.3で、--strictly-enforce-isoを無効にしたのが原因）
Lame 3.98.2 and earlier 3.98 had --strictly-enforce-iso enabled by default,
which meant less-flexible handling of bit reservoir,
and thus less-efficient use of bits at high bitrates.

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（K-Lite Mega Codec Packの連中が
　3.98.3はWindowsXPでちゃんと動かないと文句を言っている）
　
What this means? -> K-Lite Mega Codec Pack Changelog
>> Reverted LAME MP3 ACM codec to version 3.98.2
>> because version 3.98.3 does not work properly
>> on certain Windows XP systems

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（どうもね、AthlonXPで起きるらしい）
it looks like that problem happens on AthlonXP machines only.
This sounds like a building problem, likely using SSE2 instructions,
which will fail on old processors.

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（FhGはVBRで320のフレームを使わないと決めた）
At least the LAME devs just limit the frame size on 320 frames in VBR.
While FhG decided to not use 320 frames in VBR with their encoder (32 - 256 frames only).


既に海の向こうでも色々と揉めているみたい。