Quote from: KF on March 15, 2015, 07:55:23 PM

I looked through the electrum source code and experimented a little, and this can actually be fixed very easily in the code:
https://github.com/spesmilo/electrum/blob/bc3013caf0d3d6a35290e9cc9e51125b7d03d14c/lib/bitcoin.py#L166

Line 166 :
is_hex = (len(seed) == 32)

Change to:
is_hex = ((len(seed) == 32) or (len(seed) == 64))

Line 170:
return is_hex or (uses_electrum_words and len(words) == 12)

Change to:
return is_hex or (uses_electrum_words and (len(words) == 12 or len(words) == 24))

Making these two changes allows 256bit hex code w/ to be used again in the style of https://bitcointalk.org/index.php?topic=153990.0

Would this be reasonable?

If it works for you then go for it but the developer is not going to make that change for everyone. You can see his views on the matter in the thread you linked above.