Howdy,
I made a post on this bug earlier with a pic. Seems it's quite easy to build fisheries and harbors on land still. Figure the guys know about it and they'll get around to it.
When it comes to bugs in the beta it's best never to assume the devs know about it unless directly stayed by them they are aware of it. After all that's how stuff ends up not getting done with a lot of things. Everyone just assumes someone else will do it and then no one does.
Also your post just said you are "somehow" able to build them on land with no mention of how to replicate it. Plus the post was during 0.802 (aka Beta 2 version). This is 0.803 (Beta 2A) version so there is a chance whatever caused it then was fixed but it still exist due to other reasons.
