Katatonia has announced the cancellation of the MAMF festival in their official website:
"Since the promoter couldn't live up to what was signed and agreed for, our appearance at the MAMF festival in Hungary has been cancelled. However, we're already looking at the possibilities of returning to Hungary in the autumn for a club gig with additional dates in countries such as Romania, Serbia and maybe even Croatia - all previously unvisited by Katatonia."

Source:	katatonia.com
Band profile:	Katatonia