Generally the "data structure" objects are very unstable in patch6. Files like "drawpolygon.pd", "element.pd", "sequencer.pd", "setsize.pd" etc. cause pd in most cases to crash after closing the patch. Some data-structure appears on the screen only if the fontsize (in the "bomb") is changed - so in "drawpolygon.pd". It's a pity - they are very usefull tools.
E.Zipfel