Firefox and Cookies

[Origin]

For some reason, my FF at home has decided to stop accepting cookies. I go in and tick the box that says "keep cookies" and the next time I load it up it has unticked again.
What's wrong with it?
I've run NOD & Ad-aware with no results.

Thanks

 

[tolien]

Tried new profile or safe mode?

 

[marc2003]

i find this is quite often caused by firefox updating itself. deleting all cookies manually and starting again fixes it.

 

[Origin]

Tried new profile or safe mode?

Thank you, deleted my profile and it seems to be okay now