[Dovecot] 1.0beta to latest and greatest?

dear dovecot users,

This is my first post and with a rather embarassing question. To soften the question up I just want to say I've been very pleased with Dovecot thus far and its low maintenance requirements - perhaps to pleased!

I am running an ancient version of Dovecot, version 1.0.beta9. Do I risk corrupting indices etc by upgrading in one go to 2.1.2?

Thanks for your input.

Charles