Substantial DECREASE in file size?

[etcetera16]

All I have seen are comments about increases in file size. Can anyone explain
why a conversion of a file from Word 2003 to 2007 would DECREASE the size of
the file? It went from 910 KB to 257 KB. I've done a side-by-side and it
appears nothing was lost, but is it possible Microsoft was able to actually
streamline file sizes????

Note on the file type... it is a file based on a custom template that I
created. The custom macro-enabled template has also been upgraded to 2007,
and the file in question has been re-linked to the new .dotm template file.

Thanks,
etcetera16

 

[Tony Jollans]

This is to be expected. The actual data in Word 2007 format takes far more
space than in Word 2003, but the files are zipped, and so end up smaller.