This file seems to have been deleted from rapidshare, so a bit difficult to test :(
I have made some recent optimizations to the memory usage which perhaps will help... If not, we can look at it properly if you repost the file, thanks :)
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
http://rapidshare.com/files/330803463/firetest3.blend.tar.lzma.html
the test file
This file seems to have been deleted from rapidshare, so a bit difficult to test :(
I have made some recent optimizations to the memory usage which perhaps will help... If not, we can look at it properly if you repost the file, thanks :)