If you automated your Provisioning Server builds using the silent installation wizard then the Provisioning Services Console crashes when you try to configure a server’s bootstrap.
Citrix released a hotfix for Provisioning Server 5.6 SP1 that corrects the issue.
http://support.citrix.com/article/CTX127937
I applied the hotfix to servers running PVS 5.6 and haven’t had any issues.