Hi all.

We received a "Cease and Desist" letter from a law firm representing The Tetris Company, which holds the
trademark "TETRIS". They claim our "Tetrox" plugin infringes on their trademark "Tetris" and demand we
remove it. 

After consulting US and Swedish lawyers, I have decided to abide them by renaming Tetrox to "Rockblox". Old
members will remember this was the name of the plugin that Tetrox replaced.

The issue here is that trademark law is what I call a "soft" law. We do not use the word that they have
registered, and yet a judge may still find us infringing. They reason is that a word/mark is deemed
infringing if there is "likelyhood of confusion". That likelyhood can only be decided by a court, and
going to court in the US costs a truckload of money even if you win. In short: It's not worth it.

In addition to the trademark claim, they also claim copyright on "features" of the game. However, the
lawyers agree with me that those claims are nonsense so we can safely ignore them.

-- 
Björn