okay, I couldn't see a change in the frame name but I only took a quick look. But can confirm that cooldowns and durations don't seem to be working on the PTR.
Oh, this could be why. I don't recall a special Cooldown frame type but I could be wrong but here goes anyway. This is a segment of code from ActionButtonTemplate.xml.
Code:
<Frames>
<Cooldown name="$parentCooldown" inherits="CooldownFrameTemplate">
<Size x="36" y="36"/>
<Anchors>
<Anchor point="CENTER">
<Offset>
<AbsDimension x="0" y="-1"/>
</Offset>
</Anchor>
</Anchors>
</Cooldown>
</Frames>