I can access a account which is not mine and the contents shows the same in both

What steps will reproduce the problem?
1. logged into my mail id manoj.shiremath@gmail.com with password
2. i can see around 225 mails in manoj.shiremath@gmail.com
3. log out from manoj.shiremath@gmail.com
4. Then login to gmail with manojs.hiremath@gmail.com with the same password 
which i have used to access manoj.shiremath@gmail.com
5. I can see same 225 mails in this id as well and also the contact list is 
also same.

What is the expected output? What do you see instead?
Since my mail id which i created is manoj.shiremath@gmail.com, i should not be 
able to access manojs.hiremath@gmail.com

What version of the product are you using? On what operating system?
i am using google crome on windows 7 OS

Please provide any additional information below.
Please look into both the email ids and the contents and the contacts 
everything looks same. Able to login to both the email ids with the same 
password. Please provide me a solution for this at your earliest.

Original issue reported on code.google.com by manoj.sh...@gmail.com on 18 Mar 2013 at 3:54

PiRSquared17 / svnplot

I can access a account which is not mine and the contents shows the same in both #87