Version:            (using KDE 4.0.0)
Installed from:    Ubuntu Packages
OS:                Linux

kubuntu kde 4.0.1

how to reproduce the crash : 

open dolphin (in a folder with a lot of subfolders)
click View->'Adjust View Properties'
click "Show preview"
click "Current folder including all subfolders"
click "OK"

"The view properties of all sub folders will be changed. Do you want to continue?"

click "Yes"

A dialog appears 'Couting folders...'

click "Cancel"

*crash*

The backtrace : 

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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1238174016 (LWP 16472)]
[New Thread -1261188208 (LWP 16473)]
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0xffffe410 in __kernel_vsyscall ()
[Current thread is 0 (LWP 16472)]

Thread 2 (Thread -1261188208 (LWP 16473)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb6b712a1 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7eecf82 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00000009 in ?? ()
#4  0xb4d3c2d0 in ?? ()
#5  0x00000000 in ?? ()

Thread 1 (Thread -1238174016 (LWP 16472)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb6b37e96 in nanosleep () from /lib/tls/i686/cmov/libc.so.6
#2  0xb6b37ca7 in sleep () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7b38300 in ?? () from /usr/lib/kde4/lib/libkdeui.so.5
#4  0x00000001 in ?? ()
#5  0x00000000 in ?? ()
#0  0xffffe410 in __kernel_vsyscall ()