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re: alt statement, * qualifier

ahhhh. I is caught!

The way Tk sends events into the interpreter is
a complete hack. It's on my to fix list but I never
got round to it. The problem is that Tk events are
generated asynchronously to Dis, so you cant send
on channels when the events are processed. So they
get queued on the Top level window structure. They
only get sent into the interpreter when it becomes
idle (the simplest state in which I know the VM
is stable and consistent). I could set up a more
complex set of rules for delivery but never got
round to it. I think this is a serious bug, I'll
give it another look.