rsync: unexpected remote arg

So I was getting a baffling "unexpected remote arg" error from rsync today. Eventually I figured out the problem was that my argument "--executability" had become "-- executablility", I think due to a copy and paste problem where I copied some shell script code from Vim in a Konsole terminal into another Vim in another Konsole terminal. Traps for young players! If you get baffled by this error try putting an 'echo' in front of the command and then resize your terminal window to see if that affects things...

Fixing meta-keys in Vim via Mac OS X

So I configured to use Option (Alt) as Meta key: Terminal => Preferences => Profiles => Keyboard => Use Option as Meta key

But wasn't working for the key-bindings in my .vimrc:

nmap <M-j> mz:m+<cr>`z
nmap <M-k> mz:m-2<cr>`z

So I found this article: Fix meta-keys that break out of Insert mode and ended up with the following snippet for my .vimrc which fixed my Meta-key problem:

let c='a'
while c <= 'z'
  exec "set <M-".tolower(c).">=\e".c
  exec "imap \e".c." <M-".tolower(c).">"
  let c = nr2char(1+char2nr(c))

Everything is easy when you know how!