I noticed a very weird thing going on with 2.70 and 2.71. Did not check with previous versions but honestly I never noticed it before.
New scene, delete the cube and add an icosphere. Delete the lowet half, add a particle emitter on it.
Set the emission start end to something like 3-5 and the life to 2-3.
If I both play the animation, or bake the simulation I get the initial “explosion” of particles, but then, some frames after, the particles keep being emitted again. They are just emitted and do not move from the surface.
Doing the same with a cube for example did not give me this problem.
Do you get the same?
Thanks for any help
EDIT: now I am getting the same with any mesh…