I've had this happen too often now for it not to be a
bug. I have not reported it before since I have nothing
to offer in way of a crash dump or model to help figure
it out. But here goes.
I have had Wings lock up on me tighter than a drum
where there is nothing I can do except the dreaded
Ctrl-Alt-Del routine. This happens when I am examining
a model via the Middle Mouse Button, twirling it around
in a series of short back and forth movements. While
twirling, Wings suddenly locks up, to where I can do
nothing with it. I have to do a Ctrl-Alt-Del. Then the
task manager comes up and says
Wings3D shield.wings (not responding)
The mouse still won't move, so I have to do an Alt-E
(end task) and another Alt-E to actually do the deed.
Poof to Wings, and all my work is lost. I ran into this
a lot doing Bag End, and got in the habit of doing
frequent saves. But tonight I was working on a small
model, a shield with only three parts, and it did it
again. But since I can't save the model, and it does
not generate a crash_dump, I don't know how you can
work on this. But since it results in a catastrophic
loss of data, it really needs to be addressed. I can
send you the model, if you think it would do any good.
But just create a model, extract a few parts (my model
had three objects in it; shield, strap, handle they
had each been smoothed once).