Creates confilct with other Drupal module

The Beta 2 and 3 version of 2.2 have a bug that creates a conflict with the Plugins_Manager module for Drupal (6.10), such that when both it and CiviCRM are installed and enabled, trying to run any of the Plugins_Manager's "install," "uninstall," and "update" functions which either downloads and extracts new modules from the repository to the website server or removes them, it returns the following error:

Fatal error: Cannot redeclare _pear_call_destructors() (previously declared in /usr/lib/php/PEAR.php:775) in /home/username/public_html/drupal/sites/all/modules/civicrm/packages/PEAR.php on line 806

Apparently this conflict behavior did not occur with 2.2 Alpha 3, according to a response to my post at: http://drupal.org/node/390108. I only recently installed the Plugins_Manager module with Beta 2 & 3 and didn't try it with Alpha 3 or with 2.1.7. NOTE: the original issue with the admin page breaking when enabling both Beta2 and the Plugins_Manager at the same time seems to have been fixed with Beta3, but the broken install/uninstall/update conflict still exists.