I noticed a field labelled simply "fee" when performing a recent update of my witness. It does not seem to be related to the account creation fee, and I'm not aware of any witnesses using a non-zero value. Is there anybody out there that can offer some insight?
Here is where I first noticed it...
And then later I realized that steemd.com is showing it as well...
One suggestion from @riverhead in #witness on steemit.chat was that it might be an artifact of sorts from BitShares, since their transactions typically involve fees.
It might be a coincidence, but I only noticed this after upgrading to the latest version of Steem in anticipation of Tuesday's hard fork. So I'm thinking that it also might be part of preparation for a new feature that is in the works.
What do you think?