Help, please...  I'm having some backward-compatibility problems with 
the Atomic Edition of Duke Nukem 3D.  I use BUILD to create a map that 
doesn't contain any sprites, sounds, characters, etc, that don't exist in the 
normal version.  Unfortunately, another sysop tried it out with his original 
version of Duke3D and it crashes.  Using his version of BUILD, he can look at 
the map in 2D mode, but when he switches over to 3D mode, again, it crashes.  
Anyone know if this is a normal backward-compatibility problem and how to get 
around it?  I'd like to still make maps for older Duke players, but don't 
want to have to keep BOTH versions on my hard drive!  Note: 
Forward-compatibility is no problem from the older version; original levels 
and user maps made with the older BUILD are playable and modifiable with the 
Atomic Edition.
        Any help here would be great!
        - Jack Farnsworth
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