This item, based on the discussion below.
For reference see
[09:24] dgp aku, will the remaining CopyData bug be fixed if we change "bytes" to "chars" in the docs?
[09:24] aku I don't think so.
[09:24] aku If both channels have identical encoding -> -size is bytes
[09:24] dgp ok, so there are still bugs lurking
[09:24] aku If in channel is binary -> -size is bytes
[09:25] aku Anything else -> -size is characters
[09:25] dgp if channel is binary "bytes" == "chars"
[09:25] dgp modulo fcopy's weird rules
[09:27] aku Having a tracker item reminding us of this swamp is certainly a good thing.
[09:28] dgp in particular noting that http package may need to take note of [fcopy]'s unusual treatment of binary channels