Did you use torches? It may look bright in the end but it actually has a light level of zero. Crops need light to be planted.
You were in creative mode. You can break anything in creative mode, this isn't a bug.
are you sure its not nighttime?
i'm sorry for add an mod attachment. i only want to help developers to fix the bug
People use this patch to fix the bug by putting this into minecraft.jar. Hopefully it can help you(developer).
does relogging work?