I take it 12/11/12 is a December date, not the November one that it is by convention here... I missed that and assumed a month had been given, as screen grabs show November dates.
Yeah - I deal with the UK often enough I had to double check the timeline to be sure:
o First posted: 7:30 am 11-20-12 by Sam Bowne
o Page reorganized with Contents section 11-30-12 10:36 am
o New videos 4 and 5 added 12-5-12
o BayThreat Videos added 12-8-12 11:19 pm
o Attacks on the Mac OS X with simulated routers added 7:45 pm, 12-10-12.
o Apple notified 12-11-12
I dream (awake!) of The World seeing that date, thinking something along the lines of "but hey, that's annoying, I'm not sure which date that refers to!" and then just adopting ISO 8601 immediately.
For anything handwritten (cheques, dates on signatures etc.), I use YYYY-Mmm-DD (e.g. 2012-Jan-10), as I can't imagine anyone confusing the meaning of it. I avoid DD-MM-YYYY and MM-DD-YYYY, as I usually end up having to check what I meant. No one has commented on it yet.
Typed, I use YYYY-MM-DD (e.g. 2012-01-10), mainly for its sortability.
Well, in Poland we do use D.[M]M.[YY]YY too, which is unfortunately quite popular, as a short version of the format with verbal month "D MMMMM YYYY r." (r. stands for "rok[u]", i.e. year). This long version is predominantly used in lots of official forms and letters here.