Is this for an existing scene? Does this happen if you start a fresh scene? Would it be possible for you to mail a scene which does this to krakatoa-support AT franticfilms.com?
I haven’t heard of this from other testers, and my copy certainly doesn’t do this. What version of Max are you using? Also try opening the Krakatoa GUI and unchecking all of the checkbuttons for the particle types (ie. Thinking Particles, PFlow, PRT Loaders, etc.).