When you go to a table -> Structure
Then add a new column, enter column definition -> Save
The column will be added to the table and the structure of the table will be displayed. However on the bottom of the page it will still display the form you just used to add the column. This should be removed.
I have solved this bug..I will be generating a pull request today...:)
I have done a pull request please see to it...the link for the request is:
https://github.com/phpmyadmin/phpmyadmin/pull/183
Pull request merged, thanks. Fixed for -beta2.