QUOTE(Yoshi da Sniper @ Jun 1 2004, 03:59 PM)
Stacking was never useful, it was only used in bad defense maps.
This isn't really all that much of a BAD thing. Besides, Blizzard isn't out to take out all the bugs in the game, just the ones that effect Melee tournaments and hacking in general. Its unlikely (expecially at SC's age) they'll take out the Player 13/14 speed increase and 0 wait triggers. Things like that dont actually do anything with melee, thus, its likely most of the map making tricks we've come to love will always be there for us.
Meh, I PMed you with details and tried to post it in the tips/tricks section, but I guess it got rejected, so here's the deal with Player 13/14 speed increase:
The increased game speed happens because the game only allocates space for 12 players in arrays. So, by indicating another owner, you're basically overwriting the memory (the game doesn't know where the hell to put your unit's data). Therefore, it creates another array header (Player 13), with only the unit data that the map caused it to create. However, this comes at a cost: the "new" data that wasn't supposed to be there overwrites the section of the memory that was supposed to hold the data for the game speed. (This happens to all the clients since they all loaded the same map.) By doing this, it corrupts the game speed data that makes it go faster.
Player 13/14 units destroy some parts of your map, because not only does it corrupt game speed data, it also corrupts other game data that would otherwise be in the arrays. I'm not sure what it is though because I'm too lazy to test it out.
It would be hard for Blizzard to change the Player 13/14 unit issue, because the player arrays contain much of the data which is being recycled throughout the program. If you were to change all that, it would take a long time since you would have to sift through the thousands of lines of code, knowing that if you make one mistake, it might come up somewhere down the road and require another patch.
Another way to stop the issue would be to disallow Player 13/14 units to be rendered from the map data, but that would just ruin tons of maps out there that use the Player 13/14 units.
Some of the "map making tricks we've come to love" also affect Melee games, so not all of them are always going to be with us.
Edit: Meh, sry, I didn't bother to read the update. I must have rushed to reply 
So Yoshi, could you please tell us the names of the maps that work/that don't work?