Not at all.
For the curious, this is a client related bug.
When UO was created, they chose to associate specific "flags" with every piece of tile art. For a 2D tile based game, this can be very fast and efficient, at the cost of being unwieldly and prone to conflict with later uses of the same art.
For instance, there exists flags for art like tree foliage (note that the trunk is a separate piece of art) such as... dun dun dun the "Foliage" flag, the "Background art" flag, "Weight", "Height", etc.
The 2D client has different ways of rendering the art depending on the player's position, state, info from the server, and those flags. The loss of foliage in Felucca is just a tweak in the client that disables anything with the "foliage" flag.
Shadows are yet another special case, and they play weirdly depending on the flags. We'll look into it.
(BTW, other things are directly associated with art, like item properties, resources, etc, and that just scares us)