I suspected that too but was unsure about changing column sizes.
I changed the author column in the textbook table to 100 and running the OPL-update process it proceeded past that error. Then I had to change the keyword column in the keyword table to 150 from 65. Runing it again it gave me the error: 8900DBD::mysql::db do failed: Incorrect integer value: '' for column 'edition' at row 1 at ./OPL-update line 736, <IN> line 642539.
Searching through the problems I ended up have to make the following changes:
Replace EditionText1(' '), EditionText1('linear algebra','vector space','subpage'),EditionText1('Version 3.0'), EditionText1('December 9, 2010') and EditionText1('?') with EditionText1('') and running it one last time it succeeded.
It appears there is a lot of inconsistencies in the problem files.
Thanks for your help!