I'm not sure if .docx is a binary format, but have you tried setting that to 'yes'?
Lucas - where would I set that to "yes"?
System > Content Types > your .docx type
If it's in Evo I don't know...
I don't seem to have this area. The closest thing I have is Tools >Configuration > Custom Content Types. And there is no binary format option there.
I'm not sure. Here' what it says in the system:
Version codename: rev 6066
1.0.2