Version:           1.12.1 (using 4.3.1 (KDE 4.3.1), Gentoo)
Compiler:          i686-pc-linux-gnu-gcc
OS:                Linux (i686) release 2.6.30-gentoo-r5

How to reproduce: start kmail, click on mail with attachement so it is in preview window, click on attachment (like file.pdf)(left click, or right click+open with...)
Result: nothing visible, kmail spawns one zombie
Expected result: Open attachement in external application (like xpdf)
Side effect/workaround: /home/gilhad/.kde4/tmp-COMPNAME/kmaildSOMETHING/file.pdf exists and can be directly open with xpdf from command line
---
More details:
I am not running full KDE, but fluxbox. Dbus+HAL are running.
ps axf:
......
 2194 ?        Sl     0:04 kmail
 2206 ?        Z      0:00  \_ [kmail] <defunct>
 3252 ?        Z      0:00  \_ [kmail] <defunct>
 3253 ?        Z      0:00  \_ [kmail] <defunct>
 2197 ?        Ss     0:00 kdeinit4: kdeinit4 Running...
 2198 ?        S      0:00  \_ kdeinit4: klauncher [kdeinit] --fd=8
 2204 ?        S      0:00  \_ kdeinit4: kio_file [kdeinit] file local:/tmp/ksocket-gilhad/klauncherMT2198.slave-socket local:/tmp/ks
 2200 ?        S      0:00 kdeinit4: kded4 [kdeinit] e

here we see 3 zombies, from 3 unsuccessful attempts to open file.pdf

While i have highlighted the mail, the attachements are stored in subfolders of /tmp and it is possible to open it from there with any program

the attachements can be View from right mouse click and the result is what is expected:
[KMail: Attachment contains binary data. Trying to show first 75 characters.]
%PDF-1.4
%âãÏÓ
2 0 obj <</Type/XObject/ColorSpace[/Indexed/DeviceRGB 255(@g

Left click opens dialog "Open attachment 'file.pdf'?
Note that opening an attachment may compromise your system's security." [Save As] [Open with xpdf] [Cancel]
(Save As works, Open with xpdf does not)


The problem is somewhere along running external applications from KMail, but i do not know, where to look for more details/logs, or what more configuration is needed. No error dialogs, nothing in /var/log/syslog.

Please help me and direct me, where to look for more...