according to the following news post on the zentyal.org website this problem is solved in 2.03
New Zentyal 2.0-3 installer available!
2010-12-22 16:45
The development team of Zentyal, the Linux small business server previously know as eBox Platform, is glad to announce the availability of Zentyal 2.0-3 installer! This is a new compilation of all the latest Zentyal packages as well as the last system updates from Ubuntu.
Please note that this installer comes with a new Zentyal Cloud-based feature: you can see a new “Disaster Recovery” entry in the installer menu. This option allows users with a free Basic Server Subscription to automatically install the modules from a previously stored configuration backup and also to restore the configuration itself. Starting from January, full Disaster Recovery functionality will be available for those with Professional and Enterprise subscriptions.
Another mayor change in the installer is the switch from slim to LXDM as display manager – we have opted for this change to avoid crashes of the graphic environment on some systems.