It looks like there is a common error here..
i installed
BTSv1.5d and BTSv1.5fupdate as the contrib instucted, the problem is these dont actually exist in the database, i have tried to update the database changing product_id to p.product_id but this only makes the error message change as it is still looking for product_id in the database.
I am looking into a fix for this as i belive that something is getting added IE: the p. part when it should not be, if this is the case i will add an update to the contrib with the fixed file(s) and a manual fix for those that have modded versions.
until then, if anybody has a fix let us know we need it.
apache v2.2 / mysql 4.1.22 / php5