I am getting following error in err file.

110803  6:51:26  InnoDB: Error: table `ims`.`temp_discoveryjobdetails` already exists in InnoDB internal
InnoDB: data dictionary. Have you deleted the .frm file
InnoDB: and not used DROP TABLE? Have you used DROP DATABASE
InnoDB: for InnoDB tables in MySQL version <= 3.23.43?
InnoDB: See the Restrictions section of the InnoDB manual.
InnoDB: You can drop the orphaned table inside InnoDB by
InnoDB: creating an InnoDB table with the same name in another
InnoDB: database and copying the .frm file to the current database.
InnoDB: Then MySQL thinks the table exists, and DROP TABLE will
InnoDB: succeed.
InnoDB: You can look for further help from
InnoDB: http://dev.mysql.com/doc/refman/5.1/en/innodb-troubleshooting.html

And when I do the same, like copying the frm file from other database to here and drop the table, i am getting following error,

InnoDB: Error: trying to load index PRIMARY for table ims/temp_discoveryjobdetails
InnoDB: but the index tree has been freed!
110803  6:50:26  InnoDB: Error: table `ims`.`temp_discoveryjobdetails` does not exist in the InnoDB internal
InnoDB: data dictionary though MySQL is trying to drop it.
InnoDB: Have you copied the .frm file of the table to the
InnoDB: MySQL database directory from another database?
InnoDB: You can look for further help from
InnoDB: http://dev.mysql.com/doc/refman/5.1/en/innodb-troubleshooting.html

Please any one help me out of this. Also can any one tell me why this error is coming.

EDIT:

The issue is occurring only when disk size is full and when we use Truncate table. Also this is occurring only in 5.1 version but not in 5.0 version.