Unless you like the idea of a small number of corporations controlling how you use your computer, web standards should be important to you.
I got this warning page when I accessed YCP's on-line courseware system today:
Using Mozilla Firefox on Linux evidently doesn't count as a "supported" browser.
Come on, guys. Firefox works just as well under Linux (and other OSes) as it does under Windows. Put some effort on making your stuff work everywhere. The web is the new desktop and it runs on non-Microsoft platforms too.
I think a theme is emerging for my blog: software problems that annoy me.