Unfortunally there was a major problem with the database for all accounts of the jabber.hot-chilli.net domain (not accounts from other domains, like jabber.hot-chilli.eu).
Finally we decided to restore a backup from 4th/5th of May 2010 (day of the server move) and had to take the Jabber server down for about 2 hours.
Affected are just the contact lists and contact groups. This means that as an affected user of this you have to add/delete all buddies you changed since then.
We really apologize for the trouble caused, especially because the backup is one week old.
The question remains why we just got 20 rows of data inside our current database backup from this morning, missing 150000 (!) other rows. We will take a deep look into the backup process.