Barry, my JH600, the last of the 2009 models, is performing quite similarly to yours. I sometimes get the 30 second stall in the cold engine. And only rarely have stalls during riding. Nothing remotely like what LJH is experiencing.

But when it does happen, it can be dangerous. I had a stall a few weeks ago while rounding a corner coming off a busy ring road. I dropped a gear and popped the clutch to restart it, and damned if this didn't case my rear wheel to skid for just a nanosecond, causing it to slip out from under me just enough to scare the shit out of me.

Others say they don't use the clutch to restart the motor; instead they keep the clutch disengaged and hit the electric starter, the clutch out in an appropriate gear.

Totally agree with LJH that any stalling that's not related to driver error is unacceptable. I'm in California riding my KLR right now, and it idles like a purring cat. Never ever stalls. What a difference! Motorcycle engines simply should not stall of their own accord.

cheers