Planeswalker abilities

[travolter]

Dinghammer reported:

If I control a planeswalker and use one of its abilities, then return it to my hand and cast it again, I can't use any of its abilities that turn.

As soon as it returns to my hand, it's considered a new object. Then again when I put it on the stack to cast it, and again when it resolves. I should be able to use an ability of the new object.

This would also affect Momentary Blink if there weren't problems with animated permanents and effects like that.