Post 'multipart/form-data' out of Salesforce.com APEX

I have an APEX Method that attempts to Post a form to a remote endpoint out of SFDC's APEX Code. Everything seems to encode correctly, and the server sends back a 200 response, but the attachment isn't arriving with the request... is SFDC removing the content of my post body before it's sent? ``` HttpRequest req = new HttpRequest(); req.setHeader('Authorization','Basic '+EncodingUtil.base64Encode(Blob.valueOf('removed:removed'))); req.setHeader('Content-Type','multipart/form-data; boundary=-----------------------------153501500631101'); req.setHeader('X-Atlassian-Token','nocheck'); req.setMethod('POST'); req.setEndpoint(endPoint+'issue/'+c.Internal_Bug_Number__c+'/attachments'); String body = '-----------------------------153501500631101\r\n'; body = body + 'Content-Disposition: form-data; name="Filedata"; filename="'+attachments[0].Name+'"\r\n'; body = body + 'Content-Type: '+attachments[0].ContentType+'\r\n'; body = body + 'Content-transfer-encoding: base64\r\n\r\n'; body = body + attachments[0].Body+ '\r\n'; body = body + '-----------------------------153501500631101--\r\n'; req.setBody(body); ```