I have been trying out the freeware glider from touching cloud and really enjoying it so far.  However when I am going into anything more than a gentle bank (for climbing a thermal) it goes nose down and into an unrecoverable dive.  Does anyone know if this is a limitation of the glider, a bug or just pilot error?

What is your airspeed when you go into the bank? I haven't tried this glider in the sim, but it sounds like you may be putting it into a spin. Is it a straight ahead dive or a 'turning' dive?

Airspeed is at optimum glide (85? can't remember exactly).  It noses straight down.  Can't pull up or bank out.  I can make it spin with the stick, rudders do nothing.  Nose tries to come up but never levels out.