Some particle systems are causing the Debug.Log to flood with Invalid AABB / IsFinite messages. Test scene attached. Steps to reproduce 1) Load Test scene 2) Press play 3) activate particle system "Stretch" Bug report submitted: 755423 - https://fogbugz.unity3d.com/default.asp?755423_a1621g7nsq609m0g Anyone else have the same problem? R Edited: Removed comment about meshes. Looks like it's particle systems that are active with no active particles.