I've been using RDS 5.5 for quite some time and it's really stable (MAC OS). Guess the tables been turned on the stability problem. That being said I just ordered the upgrade to CAR just for fun. If you are a registered user of 5.5 then you should get a credit of $99.00 towards the upgrade, don't know how long that will last but I didn't see any time limits on the offer from last fall (you did register, right?).