InnoDB foreign key: Can't create table './recruiter/#sql-307a_d.frm'

[Kyong Park]

attempting to execute a series of alter table statements to create foreign keys such as the following:

ALTER TABLE MYTABLE
ADD CONSTRAINT FK_M_OTHERTABLE
FOREIGN KEY (OTHERTABLE_ID)
REFERENCES OTHERTABLE (ID);

After creating tables and attempting to execute the above I get:
ERROR 1005 at line 3: Can't create table './mydatabase/#sql-307a_d.frm' (errno: 150)

1. OTHERTABLE_ID is a not null column
2. the ID column in OTHERTABLE is the primary key column.
3. Finally the script I'm running works fine on a suse system running MySQL 4.1. Trying this script on OpenBSD running mysql-server-4.0.20. Doing a show table status shows that the tables are in fact innodb. The innodb table type is not stated explicitly in the create table statements but through the default-table-type variable.

Anyone have any thoughts?