Chris Muller uploaded a new version of Network to project The Trunk:
http://source.squeak.org/trunk/Network-cmm.143.mcz

==================== Summary ====================

Name: Network-cmm.143
Author: cmm
Time: 5 September 2013, 4:14:31.011 pm
UUID: c0121cc2-9a06-4a65-92e2-b00fc3dda101
Ancestors: Network-fbs.142

- Explicit MIME type for binary data.

=============== Diff against Network-fbs.142 ===============

Item was added:
+ ----- Method: MIMEDocument class>>contentTypeBinaryData (in category 'content-types') -----
+ contentTypeBinaryData
+ 	^'application/octet-stream'!

Item was changed:
+ ----- Method: MIMEDocument class>>defaultContentType (in category 'content-types') -----
- ----- Method: MIMEDocument class>>defaultContentType (in category 'instance creation') -----
  defaultContentType
+ 	^ self contentTypeBinaryData!
- 	^'application/octet-stream'!