Christopher Jones has posted an announcement about the latest release of the PECL OCI8 package (version 1.3.2 Beta) hitting the streets:
I've released PECL OCI8 1.3.2 Beta - the latest release of PHP's OCI8 extension with support for Connection Pooling and Fast Application Notification. The release is based on the current PHP 5.3 development branch.
He notes another change in this release - a "session release" bit of functionality persistent connections will do when nothing is referencing them anymore, mking them work a bit more like normal connections. Issues that could be caused by this can be corrected with a new setting (oci8.old_oci_close_semantics) in your php.ini.