The site runs Magento CE 1.7.0.2.
Customers have been reporting issues with logging in. I've been able to replicate this myself on Safari only (do not know the exact steps to replicate yet though).
Somehow, 2 frontend cookies generated (this is not the issue):
frontend fs66qk6lbfjriuf873mrbdk199 .www.foobar.com / 8 March 2014 4:34:40 pm AEDT 34 B
frontend fs66qk6lbfjriuf873mrbdk199 www.foobar.com / 8 March 2014 4:34:40 pm AEDT 34 B
The above is no issue, and you can still login on the frontend with the above cookies. However, sometimes the cookies look like:
frontend deleted .www.foobar.com / 8 March 2014 4:34:40 pm AEDT 34 B
frontend fs66qk6lbfjriuf873mrbdk199 www.foobar.com / 8 March 2014 4:34:40 pm AEDT 34 B
The above definitely causes issues and I am not able to login.
Under System >> Config >> Web:
Cookie Lifetime: 86400
Cookie Path: /
Cookie Domain: (blank)
Use HTTP Only: No
Cookie Restriction Mode: No
Should I be setting a Cookie Domain? The symptom that the customer sees is just being redirected to the login page with no errors.