(5. 60, fresh install, on WinXP)
My game is in 2039 now, default scenario settings, only a dozen ships (mostly doing nothing), a few civilians carrying stuff to Mars. I've never left the Sol system, never met any aliens. 30-day turns took a few seconds to calculate.
Suddenly the game hogged 99% CPU for an hour or more, until I remembered checking the database. I then watched it slowly grow from 1 to 1. 8 GB, at which point my harddrive was full. Then Aurora threw lots of errors saying "Harddrive full" in "UpdateGameLog". I had to kill the process.
Restarted the game, compacted the DB, then ran another 30-day turn. It gave me an error (which I unfortunately didn't write down) about being unable to "create design".
A few turns later, my first mining ship (designed a year ago) was launched:
Jersey class Asteroid Miner 17,050 tons 348 Crew 489 BP TCS 341 TH 100 EM 0
293 km/s Armour 1-59 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 1 PPV 0
MSP 18 Max Repair 120 MSP
Asteroid Miner: 3 module(s) producing 36 tons per mineral per annum
Nuclear Pulse Engine E1 Commercial (1) Power 100 Fuel Use 10% Signature 100 Armour 0 Exp 1%
Fuel Capacity 50,000 Litres Range 52.7 billion km (2083 days at full power)
This design is classed as a Commercial Vessel for maintenance purposes
It seems to work fine, though. Are there any snotty-faced aliens trying to design something they can't?