Version:           2.0 beta1 (using Devel) 
OS:                Linux

KMail supports changing the sender identity for messages to a given folder (which I use for KDE mailing lists), selectable from Folder Properties.

Unchecking "Use default identity" allows me to select my (non-Default) KDE identity, clicking OK and then checking Folder Properties again shows that the change was remembered (i.e. if I started composing an email the identity used would be correct).

However if I close KMail and restart it, the "Use default identity" box remains unchecked, but the Sender Identity resets back to the Default identity anyways. This has caused me to send quite a few messages to KDE mailing lists requiring moderation :(

This occurs whether I use Kontact (my normal method) or whether I use KMail directly.

kdepimlibs: branch 4.5, r1182594
kdepim:     branch 4.5, r1182594

gcc --version: gcc (Gentoo 4.4.4-r2 p1.2, pie-0.4.5) 4.4.4
(No, I don't use any weird CFLAGS or CXXFLAGS)

Reproducible: Always

Steps to Reproduce:
Right-click on a folder, select "Folder Properties"
Uncheck "Use default identity".
Select some identity other than the default.
Click OK.
Exit Kontact
Restart Kontact
Right-Click on the folder you chose earlier, select "Folder Properties"

Actual Results:  
The identity should be reset to Default

Expected Results:  
I expect the identity would have been saved.

OS: Linux (x86_64) release 2.6.36-rc3-00014-gcbc60ca
Compiler: gcc

My configuration (especially identities) was imported from the KDE 4.4 Kontact suite.