According to the original sources (e.g. http://www.effi.org/blog/2008-10-28-finnish-evoting-votes-lost.html): It actually wasn't about losing registered votes, but about votes not getting registered because people pulled their smart cards out too early (insert joke here).

So... if it weren't for everyone else -- ms being reason #1 -- IBM would definitely give the source out. Damn you, Microsoft!