pkg/46974: x11/qt4-libs: rendering problems (qlandkartegt, merkaartor)

[krille%users.sf.net@localhost]

>Number:         46974
>Category:       pkg
>Synopsis:       x11/qt4-libs: rendering problems (qlandkartegt, merkaartor)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Sep 16 20:40:00 +0000 2012
>Originator:     Christian Hattemer
>Release:        5.1_STABLE
>Organization:
>Environment:
NetBSD webster.lan 5.1_STABLE NetBSD 5.1_STABLE (WEBSTER) #0: Sun Aug 26 
14:40:57 CEST 2012  
krille%webster.lan@localhost:/home/krille/pc-build/obj/sys/arch/i386/compile/WEBSTER
 i386
>Description:
I have upgraded x11/qt4-libs from 4.7.4nb2 to 4.8.3 and geography/qlandkartegt 
from 1.0.1nb4 to 1.4.2nb3. The base system had also been upgraded to the latest 
state of the branch previously.

Now the display of qlandkartegt is broken. It used to start with an odd window 
layout and the map flickering heavily on every mouse move. Slightly resizing 
the window would fix it. For unknown reasons it has stopped doing that now and 
starts up ok. However all further windows that can be opened are still broken 
and can't be fixed by resizing them.

Here's what happens in the terminal:
krille@webster:~ > qlandkartegt
use config file: "" 
Warning: QNativeImage: Unable to attach to shared memory segment. 
Warning: X Error: BadDrawable (invalid Pixmap or Window parameter) 9
  Major opcode: 62 (X_CopyArea)
  Resource id:  0x0
Warning: X Error: BadDrawable (invalid Pixmap or Window parameter) 9
  Major opcode: 62 (X_CopyArea)
  Resource id:  0x0
Warning: X Error: BadDrawable (invalid Pixmap or Window parameter) 9
  Major opcode: 62 (X_CopyArea)
  Resource id:  0x0

The warnings appear when a broken dialog is shown.

It seems that qlandkartegt works a little better when running it from twm. 
However there are still broken windows and it varies which ones are broken 
during runtime. I'm normally using wm/icewm 1.3.7 (pkg updated by myself).

geography/merkaartor (0.17.2nb3 to 0.17.2nb11) has a similar problem: The main 
window used to be broken and unfixable, now it seems ok, but all further 
windows are broken and unfixable. There's no output on the terminal.

I heard that the issue might have to do with graphics/cairo, FWIW I'm using 
1.10.2nb5.
>How-To-Repeat:
See above.
>Fix: