Fellow ChucKists, Below you'll find some example code proving that extending a array of instances of a home-made class using ".size()"doesn't properly instantiates the new objects, leading to nullpointers and the shred being dropped. The "<<" operator, using "new" does lead to proper instantiation. I feel this is a bug. Yours, Kas. =====================8<============================== //instantiate a array of home made classes foo bar[1]; //check that this works <<<"your lucky number is ", bar[0].value>>>; //grow by one. bar << new foo ; //make sure it's instantiated <<<"your lucky number is ", bar[1].value>>>; //grow by a another one bar.size(bar.size() + 1); //make sure we did, size should now be 3 <<<"size is now", bar.size()>>>; //try to verify this is instantiated, it won't be <<<"your unlucky number is ", bar[2].value>>>; class foo { Std.rand2(0, 10) => int value; } ===================================================