From HennR, 2009-02-22:

http://en.wikipedia.org/wiki/IDL_(programming_language)#Problems

they are using a dirty PDF symbol ;)

Yes. Fortunately, the symbol does not link to Adobe though.

I would say that we should try them to replace their logo with one of our small logos that the readers (file browsers) should also use.

I would love to see that, but at the same time I imagine that some parties might be hard to convince. There's one thing that puzzles me, however; it seems that the icon used by Wikipedia and many others is a modification of Adobe's own icon, something that they explicitly prohibit[1]. To use it on anything other than a web page is apparently not allowed either, so we should at least have a good case for file browsers.

[1] http://www.adobe.com/misc/linking.html#pdficon

all the best, /Stian