Hi,
after having installed 2.4B1, sprites are sometimes simply not displayed in Editor. Only when I run the game, everything is fine again (also then back in editor -- but just for some time. Coming back from Mono, and they are gone again). I just see the big background sprite, which is not atlas based, so it's seems something to be wrong with the atlasses now.
When I move a sprite further down the Z-axis, it shows up as a pink box. In it's regular position (all the same z and just layer sorted) it doesn't show up at all.
Regards, habitoti