Metacity from Ubuntu Natty and stuck windows

[papaf]

Hi all,
I encountered a problem after an upgrade to natty narwhal (Ubuntu 11.04). Windows of tools opened inside PixInsight are stuck in the middle of the screen and I cannot move them. When I grab them they become translucent but are stuck. I'm talking about tools like ACDNR, for example.
I made some tests and if I launch a different WM, say xfwm4 from xfce, all works. It seems this version of metacity has something against PI. Actually, I've found this in my console where I launched metacity in:

Avviso del window manager: Specificato un WM_TRANSIENT_FOR finestra 0x4400004 non valido per 0x4400019 (PixInsight).

Sorry it's in italian, but the message should be clear. If not, I'll launch metacity with a different LANG env.

Fabio

Edit: same message in english:

Window manager warning: Invalid WM_TRANSIENT_FOR window 0xe00004 specified for 0xe00019 (PixInsight).

[Juan Conejero]

Hi Fabio,

Does this happen with PixInsight 1.7 too? Let me upgrade my Ubuntu virtual machine to 11.04 to see what happens...

[papaf]

Yes it does. I tried changing the wm to openbox and the problem disappears. I now use it by default.
11.04 isn't a great release. I am unable to use desktop effects, for example, because it locks up all my windows. Maybe it's me...

Fabio