can't move the focus to my debug build of mozilla

This might be a silly question. A couple of days ago, I got a new power 
mac g5 and I built a debug build
successfully. When I launched my build from Terminal.app (exactly the 
same way as I always
have done on Linux and Windows, which is running my custom shell script, 
which is in turn equivalent
to 1) cd to the mozilla binary directory and 2) run 'mozilla'), Mozilla 
window came up with the default
start page (http://www.mozilla.org/...). However, I couldn't do
anything with it because I can't move the focus to it. The menu at the 
top of the screen remained
that of Terminal.app. On the other hand, 'minimize', 'maximize', and 
'close' buttons
at  the top left corner of Mozilla window work. I can also move the 
window around.
Moreover, when I hover over links, the links change colors (mouse 
hovering events are passed to mozilla),
but clicking on links doesn't work.


Below is an excerpt from the run-log.  Warning messages recorded by 
nsWindowMediator.cpp and
nsScreenManager.cpp look suspicious, but otherwise I'm clueless.  Could 
anybody tell me what I'm
missing here?

BTW, I used  gcc 3.3 (gcc (GCC) 3.3 20030304 (Apple Computer, Inc. build 
1640))
and gmake 3.79.

It'd be nice if somebody could shed light on what's going on here.

TIA,

Jungshik


For application/x-java-vm found plugin Java Applet Plugin Enabler
[loaded plugin /Library/Internet Plug-Ins/Java Applet Plugin Enabler]
++WEBSHELL == 2
++DOMWINDOW == 2
Note: verifyreflow is disabled
CSS Error (chrome://global/skin/popup.css :49.24): Error in parsing 
value for property '-moz-appe
arance'.  Declaration dropped.
XP Popups: This is a nag to indicate that an inconsistent hack is being 
done on the Mac for popup
s.
WARNING: trying to find screen for sizeless window, using primary 
monitor, file /Users/jungshik/p
rj/moz/src/mozilla/gfx/src/mac/nsScreenManagerMac.cpp, line 119
Note: styleverifytree is disabled
Note: frameverifytree is disabled

CSS Error (chrome://global/skin/menu.css :49.24): Error in parsing value 
for property '-moz-appea
rance'.  Declaration dropped.
************************************************************
* Call to xpconnect wrapped JSObject produced this error:  *
[Exception... "'[JavaScript Error: "popup has no properties" {file: 
"chrome://navigator/content/m
ailNavigatorOverlay.xul" line: 152}]' when calling method: 
[nsIDOMEventListener::handleEvent]"  n
sresult: "0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)" 
location: "<unknown>"  data:
yes]
************************************************************
WARNING: getting z level of unregistered window, file 
/Users/jungshik/prj/moz/src/mozilla/xpfe/ap
pshell/src/nsWindowMediator.cpp, line 636
WARNING: getting z level of unregistered window, file 
/Users/jungshik/prj/moz/src/mozilla/xpfe/ap
pshell/src/nsWindowMediator.cpp, line 636
XP Popups: This is a nag to indicate that an inconsistent hack is being 
done on the Mac for popup
s.
WARNING: trying to find screen for sizeless window, using primary 
monitor, file /Users/jungshik/p
rj/moz/src/mozilla/gfx/src/mac/nsScreenManagerMac.cpp, line 119
XP Popups: This is a nag to indicate that an inconsistent hack is being 
done on the Mac for popup
s.