Version:           unknown (using KDE 3.3.2,  (3.1))
Compiler:          gcc version 3.3.5 (Debian 1:3.3.5-8)
OS:                Linux (i686) release 2.6.10-1-686-smp

When signing a message with kmail using s/mime, the settings of
"include-certs" in the gpgsm.conf are overwritten by the parameter
passed to gpgsm by kmail with the value 1.

this results in not sending any intermediate certificates (as used by the free thawte emailing CA) and therefore, the signature is not recognized as valid.

when I use gpgsm from the command line to sign a file, the value for "include-certs" from gpgsm.conf is used. Therefore I assume, that kmail passes the parameter to gpgsm.

this is a part of my gpgsm log taken with kwatchgpg (date/time cut off):
DBG: -> Home: ~/.gnupg
DBG: -> Config: /home/cdaller/.gnupg/gpgsm.conf
DBG: -> AgentInfo: /tmp/gpg-03YYEk/S.gpg-agent:5094:1
DBG: -> DirmngrInfo: [not set]
DBG: -> GNU Privacy Guard's S/M server 1.9.15 ready
DBG: <- OPTION display=:0.0
DBG: -> OK
DBG: <- OPTION lc-ctype=en_US
DBG: -> OK
DBG: <- OPTION lc-messages=en_US
DBG: -> OK
DBG: <- OPTION include-certs 1
DBG: -> OK
DBG: <- RESET

Versions:
gpgsm          1.9.15-5 
kgpg           3.3.2-1  
libgpg-error-d 1.0-1    
libgpg-error0  1.0-1    
libgpgme-dev   0.3.16-3 
libgpgme11     1.0.2-1  
libgpgme6      0.3.16-3 
gnupg          1.4.0-3  
kleopatra      3.3.2-2  
libkleopatra0  3.3.0-3  
libkleopatra0a 3.3.2-2