Comment 5 for bug 846871

Content-Length is a field that the Dropbox HTTP server returns in theory. If it's not there, it's not really a fault of the package...

$ HEAD http://www.dropbox.com/download?plat=lnx.x86
200 OK
Cache-Control: max-age=0
Connection: close
Date: Sat, 29 Oct 2011 14:16:38 GMT
Pragma: public
Accept-Ranges: bytes
Server: dbws
Content-Length: 16490475
Content-Type: application/x-tar
Client-Date: Sat, 29 Oct 2011 14:16:04 GMT
Client-Peer: 107.20.133.134:80
Client-Response-Num: 1
X-Robots-Tag: noindex,nofollow

As you see Content-Length is there...