Search, Post, Submit button no hover change/delay

I have some behavior on my site that is troublesome to my users. The "Post Update" "Search" and other buttons do not have a hover color change, nor do they change the cursor type to indicate that the button is "alive."
This, combined with a rather lengthy (sometimes two to three second) delay before the next page is loaded, causes many double posts as users click it twice or three times.

I see the css is in the forms.css file under the type of "submit." Where do I modify those buttons to give them a hover color change?

How can I get rid of the delay?

The same thing happens on this site with your "Search The Forums >>" button, although the delay is absent.