Kolab 3.0/Debian: Best way to start over?

Hi!

Quick question: Given that I've been messing here and there to get things 
running and figure out bug reports, including installing more up-to-date 
versions of some packages, I'm not overly confident in the state of my test 
system now - and I'd hate to create unnecessary bug reports that were caused 
by something like this...

Hence, for RC1 (as soon as it's released) I'd like to start over. Is there an 
(easy) way to re-start with the Kolab-stuff only (w/o having to reinstall the 
whole machine) - or would the recommendation rather be a full re-install?

Thanks in advance,

Thomas
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           Thomas Ribbrock, IT-Team brightsight