Yes please provide a link to the article proving this because i don't have also any problems with the application/xhtml+xml MIME type with IE6 and FF2.x.
I've not come across any problems with the XHTML 1.1 with application/xhtml+xml MIM type, it works perfectly in my IE6, IE5.5, Opera 9x and FF2.x can you please provide a link to the article proving this please?
The advanced selectors (also known as attribute selectors) are quite handy if you're willing to make styles that are solely based on a specific element (or elements). Thank you for pointing it out that you've never seen such, as I have now added to it.
Thanks for all the feedback guys (and gals?).
BTW, i read a couple of articles related with this but when i test it i don't have any problems as i say, in both ways i get the same result: