Mixed Percona and Mysql in replication

Are there any issues with having a standard mysql server as master and a percona server as slave ? my production server is mysql 5.0 but i would like to try the percona 5.1 (as slave) to assess any performance improvement with my application.

also in the migration from mysql 5.0 to percona 5.1, using only the myisam engine, the binary data files are compatible ? or should i dump and recreate the databases ?

thank you

Replication and MyISAM data format are 100% compatible: we have not changed anything in these areas of the code.