A good UI should not introduce new colors or visual elements that are unnecessary. Zebra coloring of rows has its place, but not here. Don't need the lines between posts (lines are for grids, and this doesn't need one). Additional box around arrows unnecessary. Text too small. Contrast of white on black at top draws eyes too much to title and menu.
Basically, please leave things as they are or ditch this design. I know you've spent a lot of time on it, but you will not gain users at as high of a rate with the new design.