Eeek nicely spotted. I've just updated the releases on SourcForge with the latest version of sdlinput.pas which I'm also using on Mac OS X. You should find it in JEDI-SDLv1.0/SDL/Pas/ .

sdlticks.pas should also be the latest, but let me know if there are any changes you think that would make the class more usefull.

So either grab the HeaderOnly install or just the zip file or grab it from CVS, the choice is yours.