Sylas can put an extra point fourth point into his ultimate while in cougar form.
ult cooldown is 10 seconds at rank four and functions normally otherwise.
this does prevent you from having five points in all your basic abilities.
there is a visual glitch on the Q to have a sixth level but my speculation is that's just where the fourth ult level appears to go.
this may also happen with elise.
will test further once my roomate's up and will update this.
Confirmed the nidalee bug in practice tool.
possibly happens with jayce's basic abilities, and karma ult as well, but I don't know if those will work quite the same.