The host and join round continue screens had the old problematic player list colour scheme; the latter also did not show the map reception progress bar.
The new Single Step replay key could cause an infinite loop, requiring the "WA.exe" process to be killed externally.
If you pressed Space to shoot the Ninja Rope while your Worm was preparing for a jump, and your Worm became airborn before you released Space, then a second pressing of Space would be ignored; an extra press would be required to detach the initial rope (or if the rope catch was denied quickly, the rope would fire again spuriously the moment your Worm became airborn).
Pressing Shift during an instant replay affected speed in a buggy way. Now, the same speed-control keys used during a playback replay are supported during an instant replay.
Fixes affecting game logic
The v3.6.19.17 fix: "Weapons can now be selected while your worm is reshooting the Ninja Rope." introduced a glitch: if you made your worm shoot a starter rope from mid-air, and attempted to select a weapon before the rope caught, the default would be selected instead. It was not intended that selection be possible during the starter rope shot.
Features
In an offline game or playback, the ESC dialog no longer closes automatically after minimising. This way, the game it will remain paused upon restoring until you press ESC again.
Added the ability to load colour maps that were saved in .CUS format using Beta 1/2/3pre1.