browsers from the market are not using the same ruled for CSS tags.
From my experience, test what tou are working constantly in amost popular browsers. As I know, there is no exact list with what elements are different and browsers are updated often.
6:50 pm on Jan 27, 2011 (gmt 0)
The number one thing you can do to minimize browser inconsistency is always fully validate your output [validator.w3.org].You will find minor differences, but they will be just that - minor - with the exception of IE6, which is thankfully dying. That green light has saved me so many times . . . it does work.
If you get cornered where you are considering an IE conditional, rethink your process/design, there is almost always a way out of that.