Keychain login cannot be found to store session token
Hi,
A couple of days ago I started getting errors with my Keychain.
I have tried a couple of solutions on the web such as verifying and repairing my keychain but it seems to keep getting corrupted.
I have also run Disk Utilities and verified the disk to no joy.
The only application I have installed since the errors started appearing was a "Pixelmator" trial. I have since deleted the App but the errors are still appearing.
They are appearing when I open app's such as Chrome and Safari.
Deleting login.keychain, logging out/in it prompts me for my iMessage and Facetime password on logging back in but I still get the errors.
I have also tried to restore my Keychain from a TimeMachine backup from last week but it has since been corrupted again.
MacBook Pro, OS X Mountain Lion (10.8.5)