Version:           SVN (using Devel)
Installed from:    Compiled sources
Compiler:          GCC 4.2.3 
OS:                Linux

How to reproduce: on "Desktop Settings" click on "New Wallpaper"

-----BACKTRACE------
Application: Plasma Workspace (plasma), signal SIGSEGV
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0xb4da39c0 (LWP 2962)]
[New Thread 0xb1c9ab90 (LWP 3006)]
[New Thread 0xb249ab90 (LWP 2964)]
[New Thread 0xb334fb90 (LWP 2963)]
0xb5daf79c in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 2962)]

Thread 4 (Thread 0xb334fb90 (LWP 2963)):
#0  0xb67e4820 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0xb6841246 in QWaitCondition::wait (this=0x8162dbc, mutex=0x8162db8, 
    time=4294967295)
    at /tmp/SBo/qt-copy/src/corelib/thread/qwaitcondition_unix.cpp:88
#2  0xb340366a in ?? () from /usr/lib/kde4/plasma_containment_desktop.so
#3  0x08162dbc in ?? ()
#4  0x08162db8 in ?? ()
#5  0xffffffff in ?? ()
#6  0x00000000 in ?? ()

Thread 3 (Thread 0xb249ab90 (LWP 2964)):
#0  0xb67e4820 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0xb6841246 in QWaitCondition::wait (this=0x82d5630, mutex=0x82d562c, 
    time=4294967295)
    at /tmp/SBo/qt-copy/src/corelib/thread/qwaitcondition_unix.cpp:88
#2  0xb6ae6dbd in QHostInfoAgent::run (this=0x82d5620)
    at /tmp/SBo/qt-copy/src/network/kernel/qhostinfo.cpp:247
#3  0xb68407e7 in QThreadPrivate::start (arg=0x82d5620)
    at /tmp/SBo/qt-copy/src/corelib/thread/qthread_unix.cpp:190
#4  0xb67e0383 in start_thread () from /lib/libpthread.so.0
#5  0xb5df005e in clone () from /lib/libc.so.6

Thread 2 (Thread 0xb1c9ab90 (LWP 3006)):
#0  0xb67e4820 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0xb6841246 in QWaitCondition::wait (this=0x8627d18, mutex=0x8627d14, 
    time=4294967295)
    at /tmp/SBo/qt-copy/src/corelib/thread/qwaitcondition_unix.cpp:88
#2  0xb340366a in ?? () from /usr/lib/kde4/plasma_containment_desktop.so
#3  0x08627d18 in ?? ()
#4  0x08627d14 in ?? ()
#5  0xffffffff in ?? ()
#6  0x00000000 in ?? ()

Thread 1 (Thread 0xb4da39c0 (LWP 2962)):
#0  0xb5daf79c in nanosleep () from /lib/libc.so.6
#1  0xb5daf5ba in sleep () from /lib/libc.so.6
#2  0xb715d543 in ?? () from /usr/lib/libkdeui.so.5
#3  0x00000001 in ?? ()
#4  0x00000000 in ?? ()
#0  0xb5daf79c in nanosleep () from /lib/libc.so.6