Thanks everyone for the replies. I'm a little nervous to try pre-flashing but if I can spare some paper then I'll definitely try that out. They do usually turn out pretty contrasty so I'm working on controlling that. I tried a yellow filter for the first time the other day and it seems to have tamed the sky, but there's not much detail in the shadow areas. The scene was pretty contrasty though, I doubt even a DSLR would have been able to replicate it without some editing. Here's the photo:

http://www.flickr.com/photos/aaronmichael/5449545807/