[gizmo686]

> the underlying VM mechanism was more capable than could be exploited through the GUI.

I don't think that is uncommon. VM's are (almost?) always more capable than whatever language compiles to them (as are processors). I particuarly annoying example I have had to deal with is the Java VM. It has an instruction to take/release a lock on a variable. However, there was no language level feature that exposed this directly; and the synchronized construct added try/catch blocks so that you released the lock in a different scope than you took out the lock. This was espesially annoying because I was working on a 'decompiler' based on the idea of compiling JVM bytecode to Java source code. This meant that I basicly had to resort to pattern matching how javac compiles synchronized, so my solution was non generic. Also, Java for some stupid reason does not let you subclass Enum.