An interesting post from Lullabot today on problems with Drupal's Schema API and the Twitpocalypse

It turns out that the Schema API doesn't properly understand the difference between different types of integers 

I was already concerned that
Schema API lacks the 'time' and 'date' type

I don't really understand why the Drupal team has decided to try and roll it's own database abstraction layer, and make it a core part of the system in the current state.

There seem to be quite a few bugs