there was an issue with asset creation when fee is paid in other asset than BTS. we scanned the live network and found nobody exploited it as nobody paid fees for asset creation in other currency than the core token(BTS).
We asked the committee to increase asset creation fee drastically while we were working on it. some more info can be found at: http://www.bitshares.foundation/announcements/2017-10-19-bitshares-asset-creation-incident
a new release with patch was published by @abit : https://github.com/bitshares/bitshares-core/releases
more technical info can be found at: https://github.com/bitshares/bitshares-core/issues/433 and https://github.com/bitshares/bitshares-core/pull/432
RE: BitShares: FYI Asset Creation Maintenance