Version: 1.4.0 (using 4.2.00 (KDE 4.2.0), Kubuntu packages)
OS: Linux (i686) release 2.6.28-6-generic
This may apply to all header columns in Kontact I don't know, I didn't want to try in case I lost them too.
It started with trying to drag widen the columns in the Akregator sources pane and the column order somehow got changed. I could not restore the default column order no which way, by dragging them back across or otherwise.
I decided to use the hide or delete columns feature and then restore them all again. So I hid all of the columns and the columns header bar then totally disappeared and I cannot find any way to restore it or the columns again.
Created attachment 31310 [details]
Columns how they appear when launching akregator
Created attachment 31311 [details]
Columns like they where before exiting akregator
I confirm this bug. The two attached screenshots are self explaining. I seems that akregator nevers save the column settings (which columns are shown and which width they have) and they are lost everytime when exiting or even when clicking on an other feed.
I can confirm this bug as well (using KDE 4.2.0 from official Gentoo Portage tree).
*** This bug has been marked as a duplicate of bug 152702 ***