Some digging on your transaction:
http://mocacinno.com/feecheck.php?txid=d20483e4540ede66acacebfd1a50fca41d7b8749a163f95b2c5aea666429fad3Allmost 2 Kb, a fee of 21 satoshi's per byte...
The raw transaction:
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
https://blockchain.info/tx/d20483e4540ede66acacebfd1a50fca41d7b8749a163f95b2c5aea666429fad3It does indeed look like the change sent back to your change address can be considered dust by some nodes (800 satoshi's), so this might indeed be the reason for the rejection...
I find it strange that electrum created such a transaction having dust output...