Tried installing ownCloud 8.1 last night using the instructions from here: http://cloudsurvivalguide.com/owncloud-ubuntu-ispconfig/ It had a MariaDB issue on setup with the message: "Cannot execute statement: impossible to write to binary log since BINLOG_FORMAT = STATEMENT". Googling suggests the solution is to change "binlog_format = MIXED" for logging. Would this have any side effects with ISPConfig? This is a mirror 3.0.5.4p8 system on Jessie. Luvvin' ISPConfig more every day ...
You can use binlog_format = MIXED. Only make sure, that your sql_mode is NO_ENGINE_SUBSTITUTION Run "SELECT @@sql_mode;" in mysql or phpmyadmin. You should see an empty result or NO_ENGINE_SUBSTITUTION
