Here are the last lines from the report generated w/ LD_DEBUG=libs :
_______________________________________________________________________
(....)
      9289:     find library=libncurses.so.5; searching
      9289:      search path=/opt/VirtualBox-2.1.2              (RPATH 
from file ./VirtualBox)
      9289:       trying file=/opt/VirtualBox-2.1.2/libncurses.so.5
      9289:      search path=/opt/VirtualBox-2.1.2              (RPATH 
from file ./VirtualBox)
      9289:       trying file=/opt/VirtualBox-2.1.2/libncurses.so.5
      9289:      search cache=/etc/ld.so.cache
      9289:       trying file=/lib/libncurses.so.5
      9289:
Floating point exception
_______________________________________________________________

 
... And here's the end of the report given with LD_DEBUG=all :

_______________________________________________________________
(....)
      9414:     checking for version `GLIBC_2.1' in file 
/lib/tls/libc.so.6 required by file /lib/libncurses.so.5
      9414:     checking for version `GLIBC_2.0' in file 
/lib/tls/libc.so.6 required by file /lib/libncurses.so.5
      9414:
      9414:     relocation processing: /lib/libncurses.so.5
      9414:     symbol=_nc_outch;  lookup in file=./VirtualBox
      9414:     symbol=_nc_outch;  lookup in 
file=/lib/tls/libpthread.so.0
      9414:     symbol=_nc_outch;  lookup in file=/lib/libdl.so.2
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/lib/libstdc++.so.6
      9414:     symbol=_nc_outch;  lookup in file=/lib/tls/libc.so.6
      9414:     symbol=_nc_outch;  lookup in file=/lib/ld-linux.so.2
      9414:     symbol=_nc_outch;  lookup in file=/lib/tls/libm.so.6
      9414:     symbol=_nc_outch;  lookup in file=/lib/libgcc_s.so.1
      9414:     symbol=_nc_outch;  lookup in file=/opt/VirtualBox-
2.1.2/VBoxRT.so
      9414:     symbol=_nc_outch;  lookup in file=/lib/tls/librt.so.1
      9414:     symbol=_nc_outch;  lookup in file=/opt/VirtualBox-
2.1.2/VirtualBox.so
      9414:     symbol=_nc_outch;  lookup in file=/opt/VirtualBox-
2.1.2/VBoxKeyboard.so
      9414:     symbol=_nc_outch;  lookup in file=/opt/VirtualBox-
2.1.2/VBoxRT.so
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/X11R6/lib/libXcursor.so.1
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/X11R6/lib/libXext.so.6
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/X11R6/lib/libX11.so.6
      9414:     symbol=_nc_outch;  lookup in file=/opt/VirtualBox-
2.1.2/VBoxXPCOM.so
      9414:     symbol=_nc_outch;  lookup in file=/opt/VirtualBox-
2.1.2/libVBoxQtCore.so.4
      9414:     symbol=_nc_outch;  lookup in file=/opt/VirtualBox-
2.1.2/libVBoxQtGui.so.4
      9414:     symbol=_nc_outch;  lookup in file=/opt/VirtualBox-
2.1.2/libVBoxQtNetwork.so.4
      9414:     symbol=_nc_outch;  lookup in file=/usr/lib/libSDL-
1.2.so.0
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/lib/libstdc++.so.6
      9414:     symbol=_nc_outch;  lookup in file=/lib/libgcc_s.so.1
      9414:     symbol=_nc_outch;  lookup in file=/lib/tls/libc.so.6
      9414:     symbol=_nc_outch;  lookup in 
file=/lib/tls/libpthread.so.0
      9414:     symbol=_nc_outch;  lookup in file=/lib/tls/librt.so.1
      9414:     symbol=_nc_outch;  lookup in file=/lib/libdl.so.2
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/X11R6/lib/libXrender.so.1
      9414:     symbol=_nc_outch;  lookup in file=/lib/tls/libm.so.6
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/lib/libfontconfig.so.1
      9414:     symbol=_nc_outch;  lookup in file=/lib/libz.so.1
      9414:     symbol=_nc_outch;  lookup in 
file=/opt/gnome/lib/libgthread-2.0.so.0
      9414:     symbol=_nc_outch;  lookup in 
file=/opt/gnome/lib/libglib-2.0.so.0
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/lib/libpng12.so.0
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/X11R6/lib/libSM.so.6
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/X11R6/lib/libICE.so.6
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/X11R6/lib/libXi.so.6
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/X11R6/lib/libXrandr.so.2
      9414:     symbol=_nc_outch;  lookup in 
file=/usr/lib/libXfixes.so.3
Floating point exception
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