Like many people, I've been having lots of out of memory errors with 1.8e and 1.8f. The weird thing is, all but one of mine occurred during the save-game process (often, but not always, autosaves. One did occur during the setup of a very big game, with abundant stars and planests in a huge galaxy.
What is even more unpleasant is that Smart Exception has not been generating its .zip file reports, making it difficult to report the problem. I have sent in a bug report by e-mail, though.
Has anyone else had this problem?
P.S. I'm on a brand new computer with 4gb RAM, and I've been running with up to 45 gb VM. I give it the option to go up to 60gb, but it never takes it (?!?!).