Talk:Game Updates/@comment-5991203-20120531175234/@comment-71.231.180.182-20120531181637

Because you have an enchanted breeding cave, the breeding time decreases by 20%. which means the total breeding time for any dragons when that cave is used multiplied by 0.8, you'll get the decreased breeding time.

In the case of the rainbow, 48 hours (breeding time) * 0.8 = 38.4 which gave you the 38.4hours of decreased breeding time. Incubation time should still be the original 48 hours though. If you're saying the incubation time is also 38.4, maybe you left it for 10 hours which made you think otherwise? If not, I'm not sure that's possible.

Hope this helps.