Hi Steve, have faith.... Keyshot IS easier than maxwell, by a long chalk. Sure, maxwell is great and probably still unsurpassed for realism, but as human beings we only have a life expectancy of around 75 years, which only allows us to output a few renders from maxwell.
If my 'exploding geometry' trick didn't work you could try putting tiny fillets on your glass geometry if you don't already have them - that sometimes works for me.
Also there is always the possibility that your rhino file is corrupt some how.
Hope you get it sorted out.
To keyshot staff: have mcneel released developers kits for rhino osx yet? Looking forwards to the day rhino, keyshot and hrdlightstudio all play together (with plugins) on the osx platform. Wishful thinking probably
Thanks
Ed