- Fred Machado posted about a weird FTP problem on the curl-users list and when

researching it, it turned out he got a 550 response back from a SIZE command
  and then I fell over the text in RFC3659 that says:

   The presence of the 550 error response to a SIZE command MUST NOT be taken
   by the client as an indication that the file cannot be transferred in the
   current MODE and TYPE.

  In other words: the change I did on September 30th 2008 and that has been
  included in the last two releases were a regression and a bad idea. We MUST
  NOT take a 550 response from SIZE as a hint that the file doesn't exist.

RELEASE-NOTES

@@ -25,6 +25,7 @@ This release includes the following bugfixes:
  o bad fclose() after a fatal error in cookie code
  o curl_multi_remove_handle() when the handle was in use in a HTTP pipeline
  o GSS authentication infinite loop problem
+ o 550 response from SIZE no longer treated as missing file
 
 This release includes the following known bugs:
 
@@ -34,6 +35,7 @@ This release would not have looked like this without help, code, reports and
 advice from friends like these:
 
  Yang Tse, Daniel Fandrich, Jim Meyering, Christian Krause, Andreas Wurf,
- Markus Koetter, Josef Wolf, Vlad Grachov, Pawel Kierski, Igor Novoseltsev
+ Markus Koetter, Josef Wolf, Vlad Grachov, Pawel Kierski, Igor Novoseltsev,
+ Fred Machado
 
         Thanks! (and sorry if I forgot to mention someone)