XSSI like your idea of a good visualization tool for duplicate file finding.
As you might have seen from my recent diary entry I spent a while working on a quick and dirty script for finding duplicate files.
I'd love to see a screenshot if you could dig one up - as I have a hard time imagining a useful GUI for such a tool.
Finding duplicate directories might be simple, but displaying partial duplications seems tricky to me - maybe I just don't have the eye for it.
Spent a while investigating online presentation systems recently for managing a new website in a collaborative manner.
I narrowed down the list of systems to a couple - then went looking through the code to see how secure/paranoid/flexible each one was.
(Due to my mistrust of such systems - How many times have holes been pointed out in PHPNuke et al?)
Depressingly in both cases I found exploitable weaknesses. To my shame I tried to demonstrate one in a non-malicious manner after the author(s) didn't seem to understand what I had discovered and reported ... it went wrong. The main site was borked for around 15 minutes.
I guess there's a good side the admins now spot the problem, but the down side is that I may have inspired evil people to take advantage.
It was a genuine error for which I can only apologise profusely; in my investigation I hadn't realised quite what effect I'd have.
Ce la vie ..
Based on early responses the sites/packages will both be fixed shortly so a "Name and Shame" is inappropriate - but I'll document the flaws which might encourage other authors to take more care and be more paranoid in the future...