Fix for alert box gradients in IE7/8

[necolas]

I know you ripped them out in your fix branch at some point, but if you want to put them back in, you can mimic the CSS3 transparent gradients with an extended hex syntax (the first 2 digits indicate the opacity level):

filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#00000000', endColorstr='#15000000');

Also noticed the .alert-message rule has the fallback background-color appearing after, rather than before, the rgba background-color.

[fat]

Boosh. That's awesome! Thanks again :D

[fat]

c3143b4