Is it "crashing" as in stopping for a very long time after loading? Large files take ages to load - the MotE Mansion in my version took five minutes load and render - but with no progress indicator people think it's just frozen.
If I add a progress indicator, it seems to add about one eighth to the loading time, with just a percentage. (Loading Bricks: 78%).
Would people be happier with indicators or slightly quicker loading?