Finnish e-voting results annulled, municipalities to hold new elections by Electronic Frontier Finland ry (Effi), the best summary in English, IMO;
Helsingin Sanomat;
Helsinki Times;
The Brad Blog;
NewsRoom Finland;
YLE; and
Turre (the lawyers that won the case).

The voting system was provided by Tieto and Scytl. In their News Page, Scytl declares: "Scytl's Pnyx.core successfully used in local elections in Finland" Shouldn't they update this...? It is even possible that the 2% of the votes lost was due to the Pnyx.core, instead of usability issues with the voting terminals, as has been commonly assumed - who knows.

In the Finnish municipal elections 2008, 0.17% of the paper votes were inadvertently spoiled (unclear marking in the ballot ticket etc.) and had to be dismissed. This can be compared with the 2% of the electronic votes lost in three municipalities in which the new voting system was piloted (see Effi's Electronic Voting FAQ, in Finnish).

The total fraction of the spoiled paper votes in the municipal elections was 0.6%. Most of the dismissed paper votes were due to a deliberate action by the voter (votes for Donald Duck - a popular candidate here!, empty ballot tickets etc.). There is no evidence to support the claim that the lost electronic votes were due to a deliberate action by the voters. On the contrary, in addition to the usability problems with the voting machines, there is evidence of system malfunctions which may have contributed to the lost votes (slow response times, freezing of the voting machines during the voting etc.). Additionally, the electronic voting did allow to cast an empty vote.