turn button disappearing

This happened to me today (just during the game not after a load), using the find button, moving everything that could move seemed to get it back again.

ok thanks ill give that a try next time it happens

Yeah, this is actually a feature.  Any ships you have on autopilot will start moving when you click on the turn button, and if one of them reaches their destination with movement to spare, the game will pause so you can use that extra movement.  Just click on "Find" to center on the ship in question and give it whatever orders you want.  You can even go into your various management screens and do more adjustments, as your turn isn't over until all ships are done moving.

For me it only happened once through the whole game. Every other turn I could press the turn button anytime I wished.

Using the tab key will also cycle through the ships that haven't got a destination yet for this turn.

I kept wondering, thinking the game was somehow locking up or something.