When I run the MySQL query from mysql_schema.sql to setup the data base with phpMyAdmin 2.7.0-pl2 and MySQL 4.1.12, the following error is shown:
"BLOB/TEXT Column Used in Key Specification Without a Key Length"
I should change the length from 320 to 255 for all CONSTRAINT UNIQUE columns (4 times). Now it is working.
There is some documentation in mysql_schema.sql itself, but it is not clear it should be changed 4 times.
For backwards compatibility, I would set the value to 255 instead of 320.