>And the same code is called when using an index loop (which works as expected) >so far as I can tell it's a "side effect" of using "in".
It is. The issue exists with XMLList as well and also Dictionary (although less reproducible with the latter) In all cases using the in while modifying properties of the core object have known issues. I can try to find the original bugs I filed on these in the Flash Player many years ago. The Dictionary one is particularly rough as indexed approaches aren't really viable. Mike
