Which version of percona db package should i install in ubuntu Natty Narwhal

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Hi,
I am new to both percona & Ubuntu. According to this page http://www.percona.com/downloads/Percona-Server-5.1/Percona- Server-5.1.55-12.6/deb/, percona is only available for

  • etch
  • hardy
  • lenny
  • lucid
  • maverick
  • squeeze

But i am using 11.04 (Natty). Can someone recommend me which version should i choose?