It's a good practice to use OGG files for sound. Microsoft is the ONLY one who doesn't support OGG as far as I know. It's cute you guys like to have your games working in IE, but I think it's time to put on the big boy pants and realize Internet Explorer is not just the least used browser, but it's also the most incompatible with HTML3...and 4 is a struggle, and I won't even get into 5. I'm sure the reason ACID tests always displayed funky in IE was due to them not knowing what they were doing, and I'm pretty sure if I were a MS employee, when Balmer told me to "get the acid test working" I would never have fixed the actual problems, but instead had just finagled until acid, and ONLY acid, was working.
I know I know, to each his own...but I don't live on Mars because there is no Oxygen. Microsoft, in turn, has asked us all to live on Mars since 3.11 and guess what? No oxygen. It's great for the view, but hardly worth the trip in the end. Don't hang yourselves up on getting your game to work in IE, because I gave up on that when I was learning HTML standards. I don't even put "if IE" tags in my web pages. If you use IE, you don't need to be at my page, that sort of thing. If it works right, bravo, if not, oh well sorry.
I think it's time Microsoft had a taste of their own medicine anyways. For all the systems I can't play my old games on, I won't be remiss for excluding Microsoft from my personal plans.