"in" needs to be protected? Causes SQL error

I get the following error:

user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'in, ..collumnnames.., ' at line 1 query: INSERT INTO bbtest2 (..collumnnames..) VALUES(..data..) in \wamp\www\sites\testsite2\modules\tw\tw_import\tw_import_delimited.module on line 243.

Closest issue I can find: http://drupal.org/node/450170 , is this a similar issue?

using SQL 5.1.36