yes, it happens sometimes. Hit the maximise icon on the seeks window and the button will appear again.
can't see create seek button
Also, you can go to the Live Chess settings screen here: http://www.chess.com/home/livechess_settings.html , and click the box near "Reset Live Chess windows to the default layout", then click save.
I can't see the create seek button, I play on several different computers and the window is extended of the buttom of the visible screen. Anyone else have this happen?