"Always show images" not working

[cbrace]

Hi all,

I've been running RC on my mailserver for what seems like forever -- since 2007 or so. Currently at v1.1.1

At some recent point, I can't exactly remember when, the "always show images" feature broke.

Steps to reproduce the problem:

• Settings --> Displaying Messages: Display remote inline images: from known senders
• Open an HTML mail with images
  
• Click on "Always show images from..." option
• Close, open another from same sender. Images are not displayed. Option is displayed again.
  
• Check addressbook: sender is there.

Any ideas on what could be going wrong here?

FWIW, I found this earlier thread but it offered no solution: 
"Always show images from" not working

Thanks in advance.