Tested using a custom race.

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Start a game, Open up either a planet screen or the ship designer screen. Now press escape and click main menu, The screen you were just at will be superimposed on the main menu, And when you click cancel you will be back in the game with the main menu music playing (And possibally the menu still going on in the background).

Not tested with research screen yet.

EDIT: This just in, Once again with custom races!

Create a custom race, And make the ship colourings unique.
Click on a ship in the game and note its icon.

Now start a new game (without quitting), Edit the custom race and create a contrasting ship colouring.

Now click on the icon and it should look as it was in the previous game!

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Yet another bug.

Get a constructor, Build a base (tested as a millitary res. mining base) and send another constructor, Wait for it to ask for an upgrade and click cancel.

Then you should see two (2) starbases in one parsec/square/tile.

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Edit (again): I bring you yet another bug!

This time it is all about rally points.

Using the set rally point button (just over the population meter), Click it, And then assuming you dont click on the playing area, You will have the set rally point cursor for now on.

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Edit again: My advocacy for custom races continues! I noticed that the comment for medium level espionage includes "And useing human agents within their governments."

It shouldbe too easy to create a tag for your race (I.E /r) as to replace human with whatever race you are playing at that moment!

Edit (AGAIN!):

The arceans were donating 39bc to me, And it showed up as: "We give this in recognition of you, [EmpireNameHere].

The game crashed immediatly afterwards.