- The save window closed before the program tried to save;
- the 'hide' feature didn't un-hide everything while trying to save;
- LDD seemed to have an easier time trying to save, even though at the top it said the file was (not responding) for a little while.
So while I was scared at first , I found out that aero and desktop manager actually seemed to help LDD run. Even when LDD did crash, windows aero let me know WAY ahead of time that the program was not responding, allowing me to close LDD and restart much faster, instead of having to wait a few minutes praying that it worked.
Now, I only suggest this for people who have powerful enough computers to run both LDD and windows desktop manager (and who have win7 or vista, obviously). I haven't been able to test whether the aero feature is required, or just desktop manager (then again I'm not sure what the difference is ). If it is just desktop manager, it might even help people with less powerful computers.
The oddest feature is that whatever you had "hidden" before saving stays hidden. This means that you can hide ALL the pieces and then save, which gives LDD a little more chance to not crash!
So the tip is:
1)keep windows aero (and/or desktop manager) running
2)hide your entire creation before saving