Thanks, I had missed that. Thought I was losing my mind.
And again:
3) plains biome - near spawn! - normal horse - XYZ=-2 64 283
Happened to me twice - 1.10, Windows 10, Optifine, seed=-7654182711137613304
1) swamp biome - ~3500 blocks from spawn - skeleton horse - XYZ=-3417 56 1267
2) plains biome - ~2000 blocks from spawn - normal horse - XYZ=1011 69 2000
In both cases was near large number of cows - could hear, but not visible, even using x-ray resource pack - reappeared after exiting and reloading world.
Will this bug be reopened? Or do I need to resubmit?
1. Yes, sorry - meant fortress,
2. Portal is at 21 86 3; fortress is approx. -100 65 -50
3. Yes, found an egg.
A work-around for boats seems to be working for me - make sure you are not overlapping any solid blocks (dirt, sand, stone, etc.) - then stand on the boat and break it.