phpMyAdmin throws #1062 - Duplicate entry '3' for key 1. Is this a bug or something like that in mysql or phpMyAdmin?

__________________
Connect Web Hosting Malaysia
Netallianz Web Design Malaysia

This is happen because the field that you set is unique, means NO DUPLICATE. When you try to insert or update data with existing value..the MYSQL error occur...this is not a BUG.

__________________
Try and Support Malaysia Product.
http://foto.home.net.my

Then I believe is phpmyadmin bug (at least the version I am using). I didn't try to insert a duplicate value into the primary key, I merely checked on the "insert another new row" option when you want to insert a record...

__________________
Connect Web Hosting Malaysia
Netallianz Web Design Malaysia

Im sure this happen because 'unique field', please remember, not only primary key is unique, other field also can set to unique if you set to index key. If you left NULL value for this field, when you insert new record, please make sure it is NOT NULL value.

__________________
Try and Support Malaysia Product.
http://foto.home.net.my

By observing on the error you pasted... i'm guess you're having trouble with your primary key. Try to check the primary key to be auto-incremented so that whenever you insert a new record, the primary key is automatically incremented by 1. This way, duplication of primary key won't happen.