Something in my configuration changed a while ago and now whenever I try to connect to Windows drives (either my PC at home or the network drive at the LSE) I get an error -50. Appleerrorcodes tells me this means “Error in user parameter list” but that doesn’t actually mean anything to me! I tried re-authenticating but the error message remains the same (and it doesn’t seem likely the keychain entries for two different drives would be wrong).
Moreover I can’t now connect to the shared printers at the LSE or at home. I connect to the Internet fine (thankfully)! I fear I must somehow have messed up SAMBA on my machine at a low level.
I don’t know what to do next. I will book an appointment at the Apple “Genius Bar” and see what they say but any other ideas would be welcome.