>>>>>... is working normally for me today. I thought I read somewhere the English-language Wikipedia was going dark worldwide today (Wednesday 18th)?
>>>>>
>>>>>Maybe it's just the US (?)
>>>>
>>>>It is the same for Canada.
>>>
>>>Not sure what you mean... is Wikipedia working at this moment for you?
>>>
>>>It is working properly for me right now.
>>>
>>>UPDATE: I think I know what's happening. If I use IE, it's blocked. However, my default browser is Firefox with NoScript, which is blocking Javascript on Wikipedia.
>>>
>>>If you block Javascript in your browser, Wikipedia will probably work properly.
>>
>>The Wikipedia Q&A that appears instead of the main page mentioned you can disable JavaScript. By the way, if I do that, lots of other Web pages no longer work - it seems that many pages rely on JavaScript.
>
>By disabling javascript, you say goodbye to many of the best resources on internet. I would never recommend that to my customers.

The beauty of NoScript is that, by default, it blacklists all sites i.e. disables all "active" content like JavaScript, Java, Flash, PDFs etc. These are currently by far the most common malware attack vectors.

But, you can whitelist sites you trust so they act normally. Even better, as Dragan points out, you can selectively whitelist or blacklist individual components of sites so you can filter out banner ads, click counting and all other manner of unnecessary chaff. It's a real eye-opener, visiting a new site with NoScript, and looking at its status display to see how many extraneous 3rd-party sites/domains it tries to load, both their content and their scripts.