I noticed that plugin[].resetsize() does not allow plugin[get(xyz)].resetsize(), while all other parameters for plugin[] do allow plugin[get(xyz)], for example set(plugin[get(xyz)].visible, true); will work just fine.
Just wanted to report...
Did anyone actually ever need this resetsize() function for something? I thought I would need it when creating plugins (static hotspots) on the fly with addplugin(), but even then the image width and height got filled in properly without it...