sshhhhh… IE has brought back the ‘filter’ property (without the prefix) in IE8
I personally don’t have an issue with Microsofts property prefix being left off the
filter property; either way, they don’t validate so I don’t see it as an issue. If anything I would prefer it if they left the prefix off as this would mean we would could retain some level of backwards compatibility.
What’s funny though is that this property currently works without this prefix – check my test case.