http://www.imdb.com/search/title?groups ... gs=exclude
.. depending on how much of a nerd you are (and if you vote on IMDb at all), you will get a more or less long list. Today, the titles there have changed drastically for me; while earlier the titles in the lower ranks (900-1000) had a rating of 7.6, now they have a rating of 7.0. Also, I immediately noticed all mafia movies on top vanished - every Indian and Turkish one, that is (no need to start a discussion here, you know which movies are meant). (Also, except 3 Idiots, probably the most-voted Indian IMDb-killer.)
Just having a glance at the kind of movies, I noticed they had pretty many votes, so I sorted the whole Top 1000 by the number of votes. And guess what ..
http://www.imdb.com/search/title?groups ... _votes,asc
.. the vote minimum seems to have changed from 3,000 to 25,000. This eradicates a fundamental part of the Top 1000, plenty, plenty of old movies and those in a foreign language. Nearly all movies left for me now are from 1975 or newer and tend to be from the USA/UK. (Looks like approximately 5 are not.)
Now I tried the same for the Top 250 and was even more shocked. Look at it.
http://www.imdb.com/search/title?groups ... _votes,asc
.. apparently, the same thing has been done for the Top 250, the queen of the internet's movie lists - and not in a good way at all, if you think about which titles are likely to disappear at a vote minimum of 25,000. Tarkovski, Kurosawa, Bergman, Fellini, Kobayashi et al. will have a hard time.
Oh, that would be bad, I worked on these lists not just since iCM, but for years.

PS: It helps to know that this "search-list" is always updated earlier than the final version to be seen at http://www.imdb.com/chart/top ; for Europe it's about noon, while the final list gets updated in the late evening and sometimes not even daily.