Hi Andrew,

On Thu, Feb 5, 2009 at 5:02 PM, Andrew Berry <andrewberry@sentex.net> wrote:
Has anyone looked into version compatibility between the different versions of sqlite? For example, on the same ISP, one server I checked has sqlite2, the other has sqlite3. Neither server has both drivers installed. Neither server actually has the sqlite binaries installed, though I assume that isn't common, but worth checking on other SQLite supporting hosts.

Drupal 7 only supports SQLite 3, that is the only version supported by PDO.
 
The SQLite site mentions using the command line tools to dump and restore the DB, and I haven't found anything about doing that from pure PHP. This probably wouldn't be an issue for caches and such, since an incompatible DB can just be recreated. I could see it causing headaches for "Drupal Lite" scenarios.

Pure-PHP solutions (like the Backup and Migrate module) should work in that scenarios. This module is easy enough to install.

Damien