I'm trying to figure out why duplicate key errors keep getting generated for the drupal twitter module, because it's all open source, I started reading code to figure out why it didn't seem to be using mysql BIGINTS.  I came across this comment:

/** * Dear PHP, I hate you so bad. Love, Jeff. * * Workaround for drupal_write_record(), which treats a DB bigint as a signed 32 * bit int on 32 bit PHP builds. We can STORE bigints, and PHP automatically * converts them to floats in memory while we work with them, but db_placeholders() * always treats them as %d and casts them back to dumb signed ints. * * See http://drupal.org/node/333788 for more info. * * Instead we'll set the column type to 'string' which is a little like jumping * off the Sears Tower because the elevator's broken. But that's life. */

I laughed.