problem in the latest archlinux

[zaript]

$ ompluad fox.png
Uploading fox.png: 100%
/usr/bin/lua: /usr/bin/ompluad:199: attempt to concatenate a nil value
stack traceback:
/usr/bin/ompluad:199: in function 'postAll'
/usr/bin/ompluad:243: in main chunk

Didn't have time to look into code, may be later.