Here is the official statement from FleetwoodMac.com:
Due to production and logistical reasons Fleetwood Mac’s concert in Helsinki at Hartwall Arena on the 25th of October is now cancelled. There is no replacement date for the concert. The tickets can be returned to the outlet where the tickets were purchased.
Live Nation apologizes for the inconvenience.
The tickets bought from Lippupiste for the concert should be returned to the same Lippupiste outlet where the tickets were purchased from. Tickets purchased from the Lippupiste web store or R-kioski should be sent to the following address: Lippupiste Oy, Kalevantie 2, B-talo, 33100 Tampere. Enclose the tickets with bank account information and contact information where the money should be returned to. Electronic tickets purchased from the Lippupiste web store can be returned to li********@li***.fi address. Enclose the tickets with bank and contact information where the money should be returned to.
Fleetwood Mac Live 2013
Friday 25.10.2013 Hartwall Areena, Helsinki