I've just updated 2 installations to 3.0.1 and the result is horrible. One system is running Ubuntu 12.04 and the other one is a 1&1 web hosting package. Both have WP 3.5.1. Here's a list of the problems:
1. SQL dump doesn't work (on both systems):
[28-Feb-2013 08:20:02] WARNUNG: mysqli::mysqli(): (HY000/2005): Unknown MySQL server host 'localhost:3306' (2) [28-Feb-2013 08:20:02] FEHLER: Kann keine Verbindung zur Datenbank 2005 herstellen: Unknown MySQL server host 'localhost:3306' (2)
2.) The resulting backup file can't be downloaded. The "download" link just takes you to an empty page (on both systems)
3.) The resulting backup file is 3 times bigger than the old ones (on both systems, no content has been added)
4.) The backup job takes _very_ long (524 sec. instead of about 30 sec. on one system)
Did you even test this version before releasing it? Because it went from a pretty good plugin to total crap in just one update. How can I do a downgrade to 2.x?