PHP 5.2 or 5.3 for Drupal 6.22? I have noticed that PHP 5.2 is officially recommended for Drupal 5 and 6. But as the 'System Requirement' page needs update, I am wondering what would be the anticipated problems using Drupal 5.3.

I have been using PHP 5.3.2 + FPM on a Drupal 6.22 site, and have some JavaScript issues with the Voting UP/Down and Poll modules. Is it possible that I can resolve these by downgrading PHP to 5.2?
Drupal 6.22 is compatible with PHP 5.3, but some contributed modules may not support 5.3. That said, I have been developing D6 sites on 5.3 for more than a year without any problems.

Usually, the PHP version is not the cause of JS problems, so I would start to look for the solution elsewhere (Firebug?).