Well the only version i ever installed, was the one just before this one, cause i just recently started with this addon.
This was the only time i have ever seen this error though, and right after your previous post i did upgrade to the latest version (i missed 1 update so i was running not the last, but the version before it)
Since then i never seen it anymore, but i only saw it once total anyway, and like i said, my previous install is also very new

so it depends on what a "long time ago" is
thanks!
update: @ the time of the error i was running 1.5.5 fresh install
and now im running 1.5.6