[Keith Vetter] On [clt] lists: [http://groups-beta.google.com/group/comp.lang.tcl/browse_thread/thread/6ef3d29a056b8db8/]
   * mousewheel handling
   * dash lines
   * rc filename and location
   * $HOME is less prominent in [Windows]
   * how and for whom you install
   * file permissions 
   * file volumes 
   * registering as a mime type 
   * making script executable (!# & chmod vs. assoc & ftype) 
   * font names 
   * some windows only color names 
   * option database not typically used on windows 
   * stdin, stdout and stderr may not work 
   * different set of native widgets and dialogs 
   * send command 
   * some widget padding/border differences but I can't remember what 
   * unix numerous windows managers which all behave slightly differently 
   * printing

Probably the area that causes the most problems for programmers
comes in using [exec] and coordinating with other programs,
such as:
   * launching browsers 
   * launching mail agent ("start mailto:..." on windows) 
   * most unix apps can be driven via stdin using "open |app w" 
   * spaces in file paths much more common on windows 
   * many windows commands translate to "cmd /c" or "cmd /c start" which requires eval and careful space handling 



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[Category Porting]