For ages, like since v.6.5 or something, there is has been a major
problem with Quicktime panoramas on all my PCs so that if you look up
or down and spin fast the browser will crash in a few seconds. Worse if
the panorama is large and the screen resolution is large. Makes me
phobic about looking up and down - and with Flash panoramas I have to
tell myself, dont worry, you can look down, its not Quicktime. Now it
seems to be fixed at last and I am happy!
However there is a fresh bug so that the Update Quicktime popup
announcement on IE7 will freeze the browser. But fixing the
nadir/zenith crash thing is plenty of compensation.