This is a very small alpha which closes two bugs: #484 and #485. I was hoping that this would be the alpha that would show off collections, however they aren't ready yet (getting close however!). Meanwhile, these two bug fixes enable you to use the new optimization code (which is super fast! Thanks to @kbrandwijk) and that certain animations will no longer crash which is a real productivity stopper that can no longer be ignored until collections are released.
As usual, make backups and tell me what you think.