Hilite bug in OS X appearance manager?

[Michael J. Lew]

I have spent an hour chasing odd behaviour wherein a button will 
hilite itself wrongly and unlock the screen. Here is a recipe:

make a new button. Set its autohilite to false and set its script to
on mouseDown
   lock screen
end mouseDown

on mouseUp
   set the hilite of me to false
end mouseUp

on mouseStillDown
   put the hilite of me
end mouseStillDown

Now click and hold the mouse  button down over the button. On my 
machine (OS X.2.6) the button will become hilited after about a 
second if I have the view set to appearance manager but not Mac OS 
emulated, Linux or Windows. The button should not, of course get 
hilited at all. What's more, it reports its hilite as false even 
though it looks hilited.

 From other behaviour in my stack it is apparent that the aberrant 
button hiliting is associated with an aberrant unlocking of the 
screen.

Can anyone confirm this apparent bug?

-- 
Michael J. Lew

Senior Lecturer
Department of Pharmacology
The University of Melbourne
Parkville 3010
Victoria
Australia

Phone +613 8344 8304

**
New email address: michaell at unimelb.edu.au
**