I'm running SimulAnt+ v1.5 inside Win XP on virtualbox r4.3.8/ubuntu 13.10 for testing a bike cadence sensor. But sometimes I get negative values (ref. screenshot https://drive.google.com/file/d/0B45ATdu5qGEbVjZ3UFJnR0NwNU0/edit?usp=sharing) and the Bike Cadence Event Time starts to run much faster. I've not noticed this problem in Win 8.1, can it be a virtualbox timer issue?
P.S I've migrated to VMWare virtualization (VMWare Player 6.0.1) and the timer issues doesnt' occur there.