In jedi-sdl.inc (in the 1.0 (beta) and, as far as I can tell, in the CVS repository), we have the following global directive for the FPC compiler:

Code:
{$THREADING on}
This directive is obsolete, and has been since v1.9.8 (threading is now on by default). This is why one gets the following error message...

Code:
Warning: Illegal compiler directive "$THREADING"
...when one compiles JEDI-SDL programs with newer versions of FPC. Can we please remove the directive if it's still there?