I could get used to the new post browsing. It's generally faster than the old post browsing but a complete list of hotkeys would be helpful (not to say that I wasn't surprised or hope there's a way to use the old way).
-So far I've discovered
'`', '1', '2', '3' -> vote hot keys,
'e' -> edit tags (use escape key to cancel)
'a', 's', page up, page down -> load previous or next image
F4 -> load next image
'f' -> find/search, moves focus to the search bar under the images (use escape key to cancel)
'v', F7 -> loads full size image with a zoom feature
left/right arrows scroll thumbnails
spacebar -> enter/exit full screen mode
-number pad w/ Num Lock ON
'5' -> edit tags (use escape key to cancel)
'1' -> load previous image
'6' -> find/search, moves focus to the search bar under the images (use escape key to cancel)
-number pad w/ Num Lock OFF
'3' -> load next image
'4', '6' -> scroll thumbnails
-Mouse
double click upper image -> full screen mode
drag and scroll the thumbnails using the small area underneath
mouse scroll wheel up/down to scroll through thumbnails
mouse scroll wheel up/down in full screen mode to load next or previous image