Great work making the links white Dent, great stuff.
Just looked at my PMs and realised the form buttons need a bit of a rehaul.
First problem is that the regular (i.e. 'Delete Selected', 'Mark Selected As Read') buttons and the inactive (i.e. the two '...confirm' buttons before either of the previously mentioned ones have been pressed) are completely the same style. Obviously the inactive ones need to look different from the active buttons so that users know what they can click and what they can't currently click.
Second problem, and one relevant to all form buttons (so including things like the 'Submit' search button on the homepage) is that when you apply styles to form buttons you lose all the OS-standard form button behaviour that would usually make it obvious to the user that they are dealing with a form button that they can click. It's a problem I've had to deal with many times as a web designer.
The most important thing to do (imho) to improve the usability of styled form buttons is to create a hover style for the button - input[type=submit]:hover - that changes some of the style with a mouseover - background colour, border colour, text colour, at least one or two of those things - and also, importantly, use cursor: pointer to further help signify the fact that it is a usable form submit button.
