Using Debian Testing, akregator have been upgraded to version 3.5.4-1+b1 and shows the same behaviour as described above. It pops up the KDE-Crashmanager saying: "Das Program Akregator (akregator) ist abgestürzt und hat das Signal 11 (SIGSEGV) veranlasst." (in english words: "Akregator crashed and send signal 11 (SIGSEGV") Starting it from the Commandline gives the following error: "KCrash: Application 'akregator' crashing... akregator: ERROR: Communication problem with akregator, it probably crashed."
The suggested solution to delete ~/.kde/share/apps/akregator or ~/.kde/share/apps/akregator/Archive didin't solve the problem. Akregator still doesn't start. Regards, Jan