Hi,
i have test a migration from ispcp 1.0.7 to i-mscp 1.0.1.6 (a copy of production server)
with dovecot and apache-itk options : it's work fine
i have test 2 install from sctrach of i-smcp 1.0.1.6 and works too.
i wiil be test a migration from 1.0.7 to i-mscp 1.0.1.5 and update to 1.0.1.6, wait and see.
good job i-mscp team, i love apache itk.