I recall that if I have a 2x2 plot of land (L) and water (W) like this:
L W
W L
And I have a fort or city on one of the land tiles, I should be able to go straight from one water tile to the other. However, I tested this, and I had to go horizontally and vertically through the city, instead of diagonally. Is it suppose to be like this? I remember cutting corners with boats like this before. Maybe that was a bug that was fixed?
On an unrelated note, I noticed some peculiarities with various mounted units. Firstly, why do alternative history mounts require a wonder? Horses, elephants, etc. only require a regular building.
I was surprised to see the rhinoceros rider can fortify. Not many mounted units can do this (mounted infantry comes to mind). This seems to go against the unit's purpose; it has a city attack bonus and causes collateral damage, making it more of an attacker than a defender (not to mention it gets a huge penalty to city defense). Giraffe archers seem like better mounts to have fortify, since they get bonus city and hill defense as well. I just put my giraffes in cities to sleep, but fortify or even a build up of some sort would be nice (it has chasing plans and escape plans, but that doesn't help with defending cities, forts, or other points of interest).