showPopup vs openPopup

"alta88[nntp]" <[email protected]>
Newsgroups gmane.comp.mozilla.devel.dom
Message-ID <[email protected]> 
if this isn't DOM someone can correct..

i notice showPopup has been deprecated for openPopup and 
openPopupAtScreen.  however, i have noticed the problem that a button in 
statusbar (i have given statusbar a contextmenu) which uses openPopup 
for its own contextmenu will result in both popups appearing - ie 
openPopup does not preventDefault() like apparently showPopup did.  (no 
buttons with showPopup have this problem).

so what's up with that?
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