Well, it's not really the {} button any more, but the 'Check Brackets' button in the top right hand corner.

When clicking on this button multiple times, the drop-shadow (which is the 'Enter' action when not in the editable dialog) isn't left in a constant place. It swaps between the 'OK' and 'Check Brackets' buttons.

[NOTE] Once again, yeah. Not huge, but still..