OK has been cutting a lot of flights lately. They are scaling back at high speed. I would not be surprised if the Skyteam timetable is a bit behind these facts.
In fact, take a look at
this: Prague-Zurich has been cancelled as per 30OKT2011.
Very, very sad. CSA used to be my preferred airline flying out of AMS in the direction of (south) eastern Europe. Now...well...they are worthless.