John, 

You are right when you say  "I'm right and you're lucky the fix should be easy to spot and implement".

However if you are not lucky..... You might spend exasperating weeks trying to chase down the phantom problem.... and then the  program gets "updated" and you start the entire process all over again.  "Where the hell did that damn Undo Button go??!!  As if that adds anything positive to my computer's performance.  Computers making our lives easier. 

I guess I belong in the last century.