Personalisation Issues

Hi Team,

We have an issue.

User have problem with calender (as a input field) which is not working. I have compared with the other user for whom the things are working fine, only difference is with personalization values in SU01.

so

1) When i create an user (without any roles or anything) how the personalization values are coming automatically, and where the values maintained ?

2) Is it the correct issues what we identified, because of personalization values, because, we generally do not maintain any personalization values for the users ?

Thanks,

Sankar.