It does the following:
- complete redesign of the agenda item look with custom renderer
- changes the colors (and renames the color groups in the preferences because the old colors look quite sub-optimal). Feel free to suggest better colors if you don't like them :)
- uses lighter grid lines (#25261)
- adds a pixel of spacing between items (otherwise it looks quite ugly with the new design)
http://www.tjansen.de/blog/pics/after2.png
For reference, here is the old renderer:
http://www.tjansen.de/blog/pics/before.png
This shows item changes only, with old colors and without other KOAgenda changes:
http://www.tjansen.de/blog/pics/after1.png