I am working at the new Dublin store (transferred from O/S) and we have just put the machines and barriers in.
I agree we are probably the only IKEA in the world to charge for parking, but don't blame us! It's actually one of the planning regulations put in place before we could open. The local council said we couldn't open early to ease stress on the M50 (as someone mentioned above) so 11am is our opening time.
Another regulation also stated that to discourage people from shopping at peak times and to ease traffic congestion, we need to charge for parking and that it is free in offpeak times.
We'd love to give you free parking, but talk the the council!
I think we were just happy to finally get permission to open, and they put about 30 conditions on us and the store before we were given it.