hello-
Ive had this issue several times before... it all depends on the players: pc, graphics card (ie perhaps the area uses an object with high graphivs level), what objects are in place in that area, how many are in that area, and the tileset itself...
Every modder has to remember that not every player has an up-to-date pc like we do
'> and if you have a buggy tileset sometimes the players system wont be able to handle it... which has happend to me on a few occasions...
hope that helps! and cheers!
-Kye