It’s worth noting that not everything there can be reproduced in the officially released versions of the games. Sometimes changes were made, after the final release, and unlike Nathan I usually don’t bother to check if a bug appears in earlier versions or not.
Also, there have been a handful of bugs so far have been caused by ZILF and ZILCH not producing the exact same output. (Which does not necessarily mean that ZILF is wrong, just that the game made unwarranted assumptions.)