I had some code that has been running fine for several months that all of a sudden stopped working around 11/28. I think I was incorrectly using "$" in front of passed parameters names instead of ":".
Is it possible that you previously allowed this, but a recent upgrade became stricter? I am hoping that might explain why my unchanged code suddenly stopped working.
So, is it correct that variables passed in a SUBMIT should use ":" and variable passed in a query string should use "$"