A new version of Monticello was added to project The Inbox:
http://source.squeak.org/inbox/Monticello-cmm.569.mcz

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

Name: Monticello-cmm.569
Author: cmm
Time: 7 September 2013, 4:16:59.096 pm
UUID: fa7434e5-a2e7-453a-ad96-aa689768ba31
Ancestors: Monticello-cmm.568

Fix for serializing MCDefinition requests.

=============== Diff against Monticello-cmm.568 ===============

Item was changed:
  ----- Method: MCHttpRepository>>serializeForRequest: (in category 'private') -----
  serializeForRequest: aMCDefinition 
+ 	^ ((ReferenceStream on: (RWBinaryOrTextStream on: ByteArray new))
- 	^ ((ReferenceStream on: (WriteStream on: ByteArray new))
  		 nextPut: aMCDefinition ;
  		 yourself) contents asString encodeForHTTP!