vector field instabilities

First, thanks for an implementation of vector fields that in my experience is >~10 times faster than any other so far.

Though, there are some drawbacks / bugs / whatever for me - probably the biggest one that when testing settings, the integrator very often freezes and i have to shut down my entire rhino session. often happens for setups that go near towards the edge to singularities (e.g. zero value charges, 'sparse' field population etc.).

is there maybe an obvious reason (inside the sourcecode) or should i supply some examples?

regards