Percona toolkit 2.1.8 is now available on Dotdeb for Debian 6.0 “Squeeze”. It includes some bug fixes and also beta support for MySQL 5.6 and Percona XtraDB Cluster. Take a look at this blog post by Tom Diederich for more info.
As usual, please read the list of changes for Percona toolkit 2.1.8 before upgrading.