Building a road on water gives you a trade bonus if you work those tiles. Moreover, building a rail on water increases food and trade by 50% – so more food from fish tiles, more trade from open ocean.
Bribing an AI civ to wage war on another AI simply won’t happen. So don’t waste your money trying.
To “Go To” order can send your units into odd directions, particularly when it has to travel across the map seam, where the world wraps.
The score screen (F9) draws icons of wonders you discovered, and if you discovered many wonders the icons flow off the bottom of the screen. Since VGA memory is linearly addressed, the icons overflow into the memory segment that stores the game map. This corrupts the north-pole, spawning strange land-masses and sometimes units.
Be forewarned, the following bugs will spoil you.
The Settler improvement rush bug: order a Settler to mine or irrigate, re-activate the Settler and give the same order again, repeating this sequence until the improvement is completed, all in the same turn.
You can buy buildings and wonders for less, by switching production to a cheaper unit, buying it to completion, then changing production back to your building or wonder.