Fixed. As a workaround if you don't want to wait to the next package, you can:
ALTER TABLE groups DROP COLUMN logoLastModifiedTime;
I have been updating the Kune DEB package normally other times (in my Ubuntu 12.04, Mysql v14.14 distrib5.5.24). This time, when it asked the mysql admin password for changing stuff in the db, it showed this error:
mysql said: ERROR 1060 (42S21) at line 1: Duplicate column name 'logoLastModifiedTime'
Retrying doesn't help, and retrying without asking neither (it loops). I aborted.