I have tried restarting akonadi server, same result I rebooted the machine, same result. Is there a corrupt file? Reproducible: Always Steps to Reproduce: 1. open kmail 2. check mail Actual Results: error message box pops up Expected Results: update mail folder
It is version 4.14.9, which wasn't in your drop down.
Exactly the same problem here with the same version
*** This bug has been marked as a duplicate of bug 338658 ***