The complete error text: No error message
The window affected: Class design
What you were doing at the time: Creating a new class of ships (my first salvager)
Random or Real Stars: Random
Is your decimal separator a comma? No
Is the bug is easy to reproduce, intermittent or a one-off: Intermittent - I've seen it before but have no idea what triggers it.
The 'select name' functionality becomes stuck. Selecting a new name using that button does not change the class's name. Closing and re-opening the class design window does not restore normal functioning. Saving, exiting Aurora, and re-launching does restore normal functioning.
The function number: None
The complete error text: No message
The window affected: Naval Organization
What you were doing at the time: Refitting ships
Random or Real Stars: Real
Is your decimal separator a comma? No
Is the bug is easy to reproduce, intermittent or a one-off: Easy
If you perform a refit on a ship that replaces its beam fire controls, any weapons that were previously assigned to it on the "Ship Combat" tab will disappear. To reproduce:
1) Create a ship class "Test Class" with a BFC and beam weapons.
2) Instant build a Test Class ship.
3) Go to Naval Organization/Ship Combat, and assign some of the ship's beam weapons to the BFC.
4) Create a refit class "Test Class Refit" that replaces the BFC with new ones.
5) Perform the refit on the ship.
6) Look at the Ship Combat screen for the new ship. The weapons that you had assigned to the BFC will be missing. Weapons not assigned to the BFC will remain.
Restarting Aurora does not fix the issue. I haven't tested this with a missile fire control and launchers, but it may affect that too.
See the attached DB in which I've already performed the above steps as a demonstration.
Something similar happens in my experience if your fire control is damaged - the assigned weapons vanish with it.
I got them to come back to the unassigned pool somehow in that case. Possibly hitting the auto-assign button did it?