Hi, 
this is valid for kde 4.9beta1 (4.8.80), if I go to systemsettings -> Common Appeance -> Account Details -> Password & User Details and I try to change something (eg. name filed), hit Apply and I get this error message : 

"An error occurred and your name has probably not been changed. The error message was:
chfn: Permission denied." 

Attaching log of systemsettings output, here's a reduced part: 

"
systemsettings(3343)/kutils (KCModuleProxy) KCModuleProxyPrivate::loadModule: Module not already loaded, loading module  "Password & User Account"  from library  "kcm_useraccount"  using symbol  "kcm_useraccount"
systemsettings(3343)/kdesu (kdelibs) KDESu::PtyProcess::exec: [ /build/src/kdelibs-4.8.80/kdesu/process.cpp : 293 ]  Running "chfn"
systemsettings(3343)/khtml (caret) DOM::Selection::moveTo: Selection[ Position( 0x0 "null" : 0 ) Position( 0x0 "null" : 0 ) Position( 0x0 "null" : 0 ) Position( 0x0 "null" : 0 ) 1 ] Position( 0x0 "null" : 0 ) Position( 0x0 "null" : 0 )
systemsettings(3343)/khtml (caret) DOM::Selection::validate: Selection[ Position( 0x0 "null" : 0 ) Position( 0x0 "null" : 0 ) Position( 0x0 "null" : 0 ) Position( 0x0 "null" : 0 ) 1 ] 0
systemsettings(3343)/khtml (caret) DOM::Selection::validate: [character:baseIsStart] true Position( 0x0 "null" : 0 ) Position( 0x0 "null" : 0 )
systemsettings(3343) KCMUserAccount::save: ChfnProcess->exec() failed. Error code:  3 
Output: "chfn: Permission denied."
systemsettings(3343)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
systemsettings(3343)/kparts KParts::Part::slotWidgetDestroyed: deleting part ""
"

I found old but maybe relevat discussion here: 
http://osdir.com/ml/kubuntu-bugs/2012-05/msg00265.html


su and sudo are installed, tried also adding (for Arch unofficial) kdesudo, didnt help. 

Any ideas? 
Thank you, 




Reproducible: Always