Comment 17 for bug 56369

It seems that Akregator crashes while accessing the backend corrupt the metakit storage, which causes crashes then at startup.
A workaround is to move ~/.kde/share/apps/akregator/Archive/*mk4 somewhere else. That should make Akregator start again, but all archived articles are lost.You can then copy mk4 files back and test which one causes the crash...

It would be _very_ useful if someone experiencing this crash could zip the files in Archive/ and send them to me (frank.osterfeld at gmail.com) and also his feeds.opml. (If you want to help even more, identify the exact archive file that causes the crash).