Mozilla Xlib Solaris7Sparc => weirdX. I was playing around w/ weirdX, and caused this bug. java -Dweirdx.windowmode=MultiWindow -Dweirdx.display.width=24 -Dweirdx.display.height=32 -Dweirdx.display.visual=TrueColor16 -Dweirdx.ddxw indow=com.jcraft.weirdx.DDXWindowImpSwing -Dweirdx.displaynum=2 -jar weirdx-1.0.27.jar here, weirdX creates a default window (24x32 ish +title) and then creates new windows for all objects. If you don't use very small height/width params, each popup gets its own window and behaves nicely. ./mozilla -g -d gdb -display timeless.student:2 -P messy http://www.mozilla.org/quality/browser/debugtc/bft_browser_html_mix3.html if you do, you get: [@8358f0] MenuPopup MenuPopupid='menu_Edit_Popup' MenuPopupidoncreate='initEditItems();' MenuPopupid oncreatemenugenerated='true' ###!!! ASSERTION: Content Size < 0: 'aContentRect.width >=0 && aContentRect.height >= 0', file /tmp/mozilla/layout/xul/base/src/nsBox.cpp, line 511 ###!!! Break: at file /tmp/mozilla/layout/xul/base/src/nsBox.cpp, line 511 whenever you click a menu item. A tiny window appears, w/ titlebar +~3 pixels of content. This bug is trivial because I will use different dimensions for weirdX, but it is an interesting outcome.

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