atPeek uses brand new UI components that are available only in 10.6
Why is "Extract file" and "Extract folder" disabled?
Those features are availble only in licensed version of atPeek.
Why is a file showing as blank icon?
atPeek uses Mac OS X QuickLook architecture to display asset icons and their previews. A blank icon will be displayed if OS X can not find a suitable QuickLook plugin to use.